Swelling (Postprocedural Edema)

In short: Postprocedural swelling (edema) is a temporary complication that occurs with interstitial fluid accumulation as a result of inflammatory mediators and the hydroscopic properties of hyaluronic acid fillers after the aesthetic procedure. It is most common in the lip and peri-orbital (under-eye) areas, peaks in 48-72 hours and resolves spontaneously in 95% of cases within 7-14 days. The basic principle of treatment is cold compress and antihistamine application in the first 48 hours; Medical intervention with heat therapy, manual lymphatic drainage and mechanical support (lying with head elevated) and hyaluronidase for persistent swelling (>2 months) may be required from the following days.

Description

Swelling (postprocedural edema / edema) is the temporary or chronic swelling of tissue volume that occurs after aesthetic injections (botox, filler, corrective injections), tissue destructive procedures (laser, radiofrequency, ultrasonic) or surgical interventions (rhinoplasty, liposuction, face-lift). Its mechanism is increased permeability in the vascular endothelium, fluid leakage from capillaries to the interstitial space, inflammatory mediator activation and insufficiency of the lymphatic drainage system. It appears with . The pathological basis, from the perspective of the Starling equation, is that the capillary hydrostatic pressure increase and the colloidal osmotic pressure difference draw fluid into the interstitial space. In Turkish, the word "swelling" refers to a combination of edema (fluid accumulation), inflammation (redness and swelling), and fibrous induration (permanent hardness).

Pathogenesis and Mechanism

Inflammatory Mediator Helmet: Cellular trauma to the tissues during the procedure (hemostasis needle, ultrasound, laser, surgical resection) degranulates mast cells, releasing histamine, tryptase, heparin, bradykinin and prostaglandin E2 (PGE2). Bradykinin increases the permeability of arterioles and capillaries through B2 receptors in endothelial cells; Histamine H1-H2 receptor activation triggers fluid exudation. In addition, trauma-triggered activation of Hageman factor (Factor

Hydroscopic Effect of Hyaluronic Acid: In hyaluronic acid (HA) fillers (such as Juvederm, Restylane, Belotero), each gram of HA can bind 1,000 times its own weight in free liquid (hydrophilic polymer). After filler injection, the HA chain attracts water in the tissue, causing local volume increase — this physiological process is known as "secondary swelling." The higher the concentration of hyaluronic acid (Juvederm Ultra

Lymphatic Drainage Impairment: Lymphatic capillaries are sensitive endothelial structures that collect tissual fluid (lymph) and carry it to the lymph nodes. Procedure-related swelling very often occurs due to compression of lymphatic capillaries or exceeding drainage capacity after increased interstitial fluid. In particular, lymphatic drainage in the face, neck and chest area is maximal at 3-5 weeks (post-surgery). Lymphatic function may be impaired by age, steroid use, history of radiation (after lymph node dissection), and protein malnutrition.

Types: Pitting etc. Non-Pitting Edema

Pitting Edema: The finger leaves a "pit" (imprint) upon pressure — this is indicative of free fluid (lymph) accumulation in the interstitial space. On palpation, the fluid is easily displaced and tends to return to the injection site. Its mechanism is increased capillary permeability and fluid accumulation. The physiological type is better; Spontaneous resorption is rapid (3-7 days) with 99% recovery.

Non-Pitting Edema: It does not leave a mark to finger pressure — this reflects the "non-compressible" nature of the hardened tissue as a result of increased concentration of interstitial proteins (protein-rich exudate) or induration of fibrous tissue (scarring / fibrosis). Its mechanism is more complex: either persistent inflammation (chronic outgoing inflammatory module) or the formation of a granuloma/scar capsule around the HA filler. The probability of spontaneous resolution of non-pitting edema is low (20-30%); Steroids, hyaluronidase, or surgical aspiration may be required.

Risk Factors

Patient Characteristics: The incidence of postprocedural swelling varies with the patient's age, hormonal status, nutrition, and medical history. With advanced age (50+ years), the risk of swelling increases as lymphatic and venous drainage is slower. In the luteal phase of the menstrual cycle (the period from ovulation to menstruation), capillary permeability increases under the influence of estrogen and progesterone and swelling may take longer to resolve. In the presence of chronic sinusitis or allergic rhinitis, sinus edema amplifies swelling in the nasolabial area. Protein malnutrition (albumin <3.0 g/dL), hypotension, chronic liver failure, kidney disease (proteinuria), lymphatic dysgenesis, and post-mastectomy lymphedema greatly increase the risk of antecedent.

Drug and Supplement Interactions: Since anticoagulants (warfarin, DOACs), antiplatelet agents (aspirin), NSAIDs and blood thinning supplements (fish oil, ginseng, ginkgo) increase capillary fragility and weaken vascular integrity, post-procedural swelling as well as hematomas and ecchymosis increase. Chronic use of steroids suppresses lymphatic function and delays treatment.

Technical Factors: Injection depth: Superficial dermal injection triggers more swelling than vertical subcutaneous injection (thin skin, high vascularity). Injection volume: Multi-point injection of 0.3-0.5 mL instead of more than 1 mL of HA injection into a single point (“bolus” technique) reduces swelling. Needle etc. Cannula: 27G cannula causes less trauma than 25G needle. Aggressive massage: Massage within the first 10 minutes of post-injection increases the micro-spread of the HA filler and reduces the risk of local swelling; However, too intense a massage may cause vascular trauma. Procedure duration: With long-term laser, RF or surgery, tissue thermal damage and inflammation are more severe.

Regional Differences and Incidence

Lip (Vermillion, Philtrum, Commissure): The lip has the highest incidence of swelling in aesthetic filler applications (90+% post-filler patients report significant swelling within 48 hours). Cause: (1) high arterial and venous vascularity (inferior labial artery, mental artery); (2) continuous movement of the highly mobile muscle (orbicularis oris) increases fluid mobilization; (3) oral mucosa histamine reservoir mechanism (high mast cell density). Peak lip swelling time is 24-72 hours, complete resolution time is 5-7 days (some patients recorded 10 days).

Peri-Orbital / Under Eye (Tear Trough): Under-eye treatment has an incidence of swelling of around 80%, slightly lower than lip, but is clinically challenging because swelling at the edge of the eye dramatically affects optical appearance. Peri-orbital skin is thin and young (dermal thickness <1 mm), lymphatic drainage may take up to 3-4 weeks. Tear trough filler is performed under the orbicularis oculi muscle — muscle contraction functions as a fluid pump. Solution time 1-2 weeks (longer than lips).

Nasolabial Fold (NLF): Filler applied to the nasolabial line presents a clinic with moderate swelling, with an incidence of swelling of around 60%, and resolves within 5-7 days. In the removal of NLF, a high dose (1.5-2 mL per session) of HA is injected, where the hydroscopic effect of HA becomes evident.

Cheeks / Malar and Zygomatic Region: Injections for breast augmentation or malar padding have a swelling incidence of around 50%, lasting 3-5 days. Since the malar area is wide and massive, the swelling appears more homogeneously distributed and does not cause as much aesthetic discomfort as the peri-orbital area.

Surgical Procedures — Endoscopic Rhinoplasty, Full Facelift, Liposuction: The swelling resulting from a surgical incision/dissection is different from an injection — it is more massive, elongated. Facial swelling after rhinoplasty may remain in 30-50% for 1-3 months, and in 10% of patients, the risk of permanent swelling continues for 6-12 months or even longer. Swelling after liposuction may persist for 3-6 months depending on the inflammation and lymphatic drainage burden; Compression garment (24 hours/day for 4 weeks, then 12 hours/day for 4 weeks) is the gold standard treatment. After full facelift or cervicoplasty, swelling decreases intensely for 3-4 weeks and then gradually decreases for 3 months.

Clinical Appearance and Diagnosis

The diagnosis of postprocedural swelling is based on clinical observation and anamnesis. Palpation (pitting test) distinguishes the swelling character (liquid vs. fibrotic) from the period. Erythema (redness) and local temperature are indicators of the severity of inflammation; Pain (dull ache vs. sharp pain) is important in the differential diagnosis of infection or neuropathy.

Ultrasound (Ultrasonography): B-mode ultrasonography visualizes the amount and distribution of subcutaneous fluid accumulation. In case of persistent swelling (>2 months), hypoechoic area (fluid collection), etc. It can distinguish hyperechoic nodules (granuloma, scar, or filler aggregate). Color Doppler evaluates arterial flow in case of suspicion of vascular occlusion.

MRI (Magnetic Resonance Imaging): T2-weighted sequences show bright fluid increase (hyperintense), T1 gadolinium contrast-enhanced sequences show granuloma membrane (gadolinium uptake). It is used to diagnose the character of persistent granuloma or scar induration; However, it is not economical or practical in routine diagnosis.

Timeline and Recovery Phase

0-4 Hours (Early Phase): Minimal swelling immediately after the procedure. The skin may show reactive hyperemia (redness) of local capillaries, but volumetric swelling is not yet evident. During this period, the patient is under anesthesia monitoring or clinical observation is continued.

4-24 Hours (Start of Swelling): After the first 4-6 hours, the histamine and bradykinin cascade peaks and swelling begins to be noticed. By 24 hours, moderate swelling may manifest—especially the lip and peri-orbital areas may swell 1.5-2x. Patients cannot wear make-up or normal expression; some patients report social anxiety.

24-72 Hours (Peak Swelling): The peak time for postprocedural swelling is 48-72 hours. Lip injections show maximal swelling after 72 hours (difficulty in completely closing the lip, difficulty speaking and mastication). Peri-orbital swelling peaks in 48-60 hours and eye opening may be restricted.

3-7 Days (Rapid Decline): Starting from the 3rd day, inflammatory mediators are metabolized and lymphatic drainage begins to accelerate. 80-85% patients report 80+% improvement by day 7. Edema decreases significantly, but slight residual swelling may remain.

1-2 Weeks (Full Solution): After 14 days, 95% patients achieve 95%+ of normal facial volume. A very slight bulge may remain, but it is not noticeable within the social norm of the society. All medical applications (additional injection, laser, RF) can be performed comfortably.

2-4 Weeks + (Residual Swelling / Red Flag): After 2 weeks, permanent swelling may turn into pitting edema and take on the character of non-pitting hard induration. This is due to the formation of granulomas, migration of the HA filler, chronicization of aseptic inflammation, or formation of a fibrous capsule (fibrosis). Ultrasonography imaging and possible hyaluronidase intralesional injection may be required.

Home Care and First Response

RICE Principle (Rest, Ice, Compression, Elevation): For the first 48 hours, cold compress (ice pack, frozen gel pack) is applied to the injection area for 15-20 minutes, every hour. Cold provides capillary vasoconstriction, reduces fluid leakage and suppresses inflammatory mediator activity. When an Ace bandage or compression garment is applied to the injection site, mechanical pressure accelerates interstitial fluid mobilization. Lying with head elevated (30° pillow support) improves fluid drainage with the help of gravity—especially critical for peri-orbital swelling (patient should sleep with 2-3 pillows for the first 2 nights).

48+ Hours (Hot Therapy and Massage): After 48 hours, heat application (hot compress, infrared lamp, sauna are not recommended because they are too aggressive) promotes capillary vasodilation, increases arterial inflow and accelerates venous-lymphatic drainage. Or, if massage: Gentle, circular massage (10-15 minutes, 2x daily) is done around the orbicularis oculi or lips, muscle contraction triggers the pump mechanism. SUBJECT to aggressive massage (risk of vascular damage).

Position Recommendation: For the first 48 hours, supine position (on your back) or semi-upright (head-of-bed 30-45°), no ventral position (risks of crushing the procedure area). Any post-normal position is okay.

Activity Restriction: For the first 48 hours, AVOID intense exercise, sauna, hot tea/coffee, spicy food (vasodilator effect), alcohol (venous stasis). DO NOT apply pressure to the injection site (“working the filler in”) for the first 48 hours (increases swelling).

Pharmacotherapy and Medical Treatment

Antihistamines (Oral): Cetirizine 10 mg (Pirinase) or desloratadine 5 mg (Clarityne), 1-2 x daily × 5-7 days, reduces histamine-mediated permeability increase. Sedating antihistamines (diphenhydramine, chlorpheniramine) are not recommended for 2-3 weeks (rebound effect).

Topical Steroid Creams: Hydrocortisone 1% cream (e.g., Cortisol 1%), 3x daily × 3-5 days, suppresses local inflammation. Highly potent steroids (betamethasone, triamcinolone) carry the risk of atrophy in thin skin areas such as the face — medium-low potency is preferred.

Systemic Steroid (Severe Swelling): Prednisolone 20-40 mg (= Deltacortil) × 3 days orally, used in case of severe or angioedemal swelling (suspected Quincke's edema) — most effective if started in the early stage (<24 hours). However, steroids are not the "gold standard" for routine postprocedural swelling because there is a risk of delayed healing and infection.

Bromelain Supplement: Pineapple enzyme breaks down the fibrin matrix of edema with its protease activity. Bromelain 500-1,000 mg TID × 5-7 days shows modest efficacy in in vivo studies—limited solid RCT despite anecdotic benefit.

Arnica Montana (Topical and Oral): Arnica gel (5% extract) claims to reduce redness and swelling, but RCTs are contradictory — it may be as effective as placebo. However, patient tolerance is good and there are no contraindications; can be used in places.

Vitamin K Cream (Topical): Phytonadione cream (Auriderm) provides some help in resolving hematoma and ecchymosis; Minor role in the treatment of swelling.

Lymphatic Drainage Massage (Manual Lymphatic Drainage, MLD): Manual lymphatic drainage, performed by a physiotherapist, with light pressure, rhythmic, quick release technique after 5-10 seconds, stimulates the lymphatic closed system and accelerates its drainage. Gold standard especially in post-surgery (rhinoplasty, facelift, liposuction); Post-filler is optional but useful for swelling. Starting from the 2nd week, 3-5 sessions (1-2 weeks apart).

Diuretic (DO NOT): Oral diuretics (furosemide, spironolactone) are strongly NOT recommended for the treatment of postprocedural swelling—they create the risk of dehydration, electrolyte imbalance, and rebound edema. Diuretics may be indicated in systemic hypertension or heart failure; Not useful for procedural edema.

Prevention Strategies

Preoperative Phase (1-2 Weeks Before): Anticoagulant and antiplatelet drugs (aspirin, warfarin, DOACs) - except ASA ≤100 mg maintenance dose, have no specific role in preventing swelling but reduce the risk of bleeding. Aromatic and antioxidant supplements (vitamin C 500-1,000 mg, vitamin E 400 IU) can support collagen synthesis.

Technical Optimization: (1) Injection depth: Submuscular/subperiosteal injection rather superficial dermal, pitting reduces swelling. (2) Injection volume: "Micro-dosing" (0.3-0.5 mL × multi-point) is better than "bolus" injection. (3) Needle etc. cannula: 27G cannula preferred. (4) Few injection points, minimal tissue trauma.

Early Postoperative Intervention (First 6 Hours): Immediately after the procedure, start cold compress, antihistamine premedication (cetirizine 10 mg) and "hands-off" policy (post-injection massage 6 hours later).

Applying for a Doctor - When

Normal Swelling: If pitting edema resolves spontaneously within 7-10 days with regular ice and antihistamines, medical application is not necessary.

Red Flag Symptoms — Urgent Application:

• Asymmetric Sudden Swelling (regional swelling increase within 1-2 days): Suspicion of filler migration or granuloma. Ultrasonography is required.
• Severe Pain (7-8/10 scale) + Redness + Temperature: Infection (cellulitis, abscess) or vascular complication. Antibiotic or vascular emergency assessment (nitroglycerin, hyaluronidase, neuroophthalmology consult).
• Quincke's Edema (Angioedema): Sudden, very severe, symmetrical swelling, twisted lips and face, shortness of breath — allergic reaction. EMERGENCY: IM epinephrine 0.3-0.5 mg, IV antihistamine, steroid, hospital referral.
• Vision Change Post Peri-Orbital: Optic nerve occlusion, retinal artery occlusion or levator palpebrae paralysis (neuroophthalmic complication). URGENT: neuroophthalmology consult.
• Persistent Swelling (>4 weeks, non-pitting): Ultrasonography, hyaluronidase injection + steroid intralesional evaluation.

Related Aesthetic Procedures — Risk Profiles

Hyaluronic Acid Filler (Juvederm, Restylane, Belotero, Stylage, Reflex): The incidence of swelling is 60-90% depending on the procedure and HA concentration. Highest: lip augmentation (90%); peri-orbital tear trough (80%); malar (60%); nasolabial (60%). The hydroscopic effect of HA increases with the linear relationship in filler HA concentration.

Botox (Botulinum Toxin-A) Injection: The incidence of swelling is 5-10%, mostly mild. Since Botox is an aqueous suspension, it is not as hydrophilic as HA. Micro-bruising with minimal massage. Glabella or periocular botox may cause minimal swelling at the edge of the eye.

Rhinoplasty (Surgery): Post-rhinoplasty swelling, 50% 3+ weeks, 20-30% 1-3 months, 10% permanent 6-12 months. Mechanism: tissue dissection, osteotomy trauma, septum osteotomy, immediate vascular damage, magnitude of natural healing response inflammation. Compression garment and lymphatic drainage are critical in reducing swelling.

Liposuction — Abdomen, Flanks, Thighs: Swelling in 80% patients 1-3 months, 20% 4-6 months. Very low energy high volume fat aspiration + mechanical trauma maximizes inflammation. Compression garment 24 hours/day for 4 weeks, then 12 hours/day for 4 weeks is the gold standard.

Laser (Non-Ablative RF, Fractional CO2, Pulse-Dye Laser): Laser thermal induction increases the risk of swelling caused by inflammation during collagen remodeling. Non-ablative laser (Cynosure Palomar Starlux, Synergistics IPL) slight swelling 3-5 days; fractional laser strong swelling 1-2 weeks (superficial erythema + edema).

Microneedling (Dermaroller, MPN): 0.5-2.0 mm dermaroller post-procedure swelling is mild (20-40%), 2-5 days. Radiofrequency-assisted microneedling (RF-MPN), more thermal damage = swelling 50-70%, 1-2 weeks.

HIFU (High-Intensity Focused Ultrasound): Ultherapy, focused ultrasound energy produces heat in the SMAS (superficial muscular aponeurotic system) layer. Post-HIFU swelling is mild to 30%, mostly pitting in 3-7 days.

Related Terms

Postprocedural swelling is closely related to the following terms and may require back-reference in diagnosis, treatment, or differential diagnosis:

• hematoma — Palpable blunt blood collection, distinct from swelling; similar timeline but not pitting edema.
• ecchymosis — Subcutaneous blood extravasation, flat, color change; It may coexist with pitting edema.
• keloid — Hypertrophic scar, collagen deposition exceeding the wound border; permanent non-pitting induration, treatment is different.
• Hyaluronidase — Retraction of HA fillers; It is used in cases of persistent swelling + filler migration.
• Filler (Fillers) — Main procedure, basic knowledge of HA fillers.
• Lip Filler — Swelling is the most common procedure.
• Postoperative Care — General post-procedure treatment protocols.
• Liquid Face Lift — The procedure used in combination therapy shares the risk of swelling.
• HIFU (Ultherapy) — Device-based procedure, post-procedure swelling profile.
• botox — Low risk of swelling in combination therapy.

Frequently Asked Questions

1. How long does postprocedural swelling remain?

   For most procedures, 80% resolves within 7-10 days, 95% resolves after 2-3 weeks. Lip injection can be 5-7 days, peri-orbital 1-2 weeks, surgery (rhinoplasty, liposuction) 3-6 months. If it persists for >2 weeks, medical advice is recommended.

2. What can I do to speed up the swelling?

   Cold compress (15 min hourly), antihistamine (cetirizine 10 mg), head tilt (30°), NSAID avoidance (risk of bleeding) for the first 48 hours, hot compress and gentle massage after 48+ hours. Manual lymphatic drainage (by a physiotherapist) from the 2nd week.

3. Swelling pitting etc. How to distinguish non-pitting?

   If a "pit" (imprint) remains due to finger pressure, pitting is usually mild and resolves quickly. If it returns after a short time and there is no stiffness, it is pitting. If it is hard, non-pitting and painful, it is likely to be non-pitting - granuloma or scar; Ultrasound is recommended.

4. Do diuretics reduce swelling?

   No. Diuretics should NOT be administered for postprocedural swelling—they create dehydration, electrolyte imbalance, and rebound edema. Diuretics are not justified unless there is system edema (heart failure, kidney disease).

5. Can I have a masseuse during swelling?

   The injection site should NOT be massaged for the first 48 hours. After 48 hours, gentle circular massage (10-15 min, 2x/day) accelerates lymphatic drainage. DO NOT massage aggressively (risk of vascular damage).

6. Can I wear make-up during swelling?

   Some patients require make-up for aesthetic precision. After 24-48 hours, use an antibacterial make-up product to cover it up. Do not apply makeup push/rub directly to the injection site. Make-up during major swelling (72 hours), difficult to cover the swelling artistically; Planning social events is recommended 1 week after the appointment.

7. How many hours should I use cold compress?

   First 48 hours, 15-20 minutes × hourly (e.g. 08:00, 09:00, 10:00… or cumulative 4x/day). After 48 hours, cold compress becomes an option; Hot compress may be preferred.

8. Does alcohol increase swelling?

   Yes. Alcohol causes vasodilation and slows down venous stasis and lymphatic drainage. Alcohol consumption is, OF COURSE, in the first 48 hours. After 48 hours, use moderate alcohol (1 glass); but recommended avoidance for 1 week.

9. What could be the cause of persistent swelling (>4 weeks)?

   Persistent swelling may be due to fill migration, granuloma formation, peripheral scar/fibrosis, persistent HA aggregate, or rare infection (biofilm). Ultrasonography, possible hyaluronidase injection, steroid intralesional evaluation are recommended.

10. Does hyaluronidase solve swelling?

    Hyaluronidase is effective in withdrawing HA fillers; However, it does not have a direct role in the treatment of "swelling". If swelling is caused by filler aggregate or migration, hyaluronidase can indirectly reduce swelling by breaking down the HA filler. Hyaluronidase is not helpful in pitting edema (fluid accumulation).

Op. Dr. Hamza Gemici Comment

Postprocedural swelling is routine for every aesthetic physician; But the most important thing is to minimize the amount of swelling through patient expectation management and technical optimization. In my 25-year career, swelling is a sign of “wellness” — it indicates tissue trauma and inflammatory response; The complete absence of swelling may suggest the ineffectiveness of the procedure. But, the social and psychological impact for the patient is important. With lip injections, while 90% of patients experience significant swelling within 48 hours, I can reduce this swelling to 50% with cannula techniques and low volume multi-point injection. In peri-orbital tear trough treatment, sub-SMAS injection rather than superficial dermal injection reduces swelling. The hot/cold strategy for the first 48 hours and preoperative antihistamine initiation make a difference in clinical outcomes. In case of persistent swelling, rapid action—ultrasound and hyaluronidase injection at week 2—should be performed without closing the granuloma/scar window. In each patient, I should give written guidance and video formats about postprocedural procedures (RICE, antihistamine, activity restriction, compression) — compliance increases by 70%.

Resources

1. Mojallal A, et al. "Postoperative Edema in Dermatologic and Cosmetic Surgery." Plastic and Reconstructive Surgery
   Authors: Mojallal A, et al.
   Publisher: PubMed / Plastic and Reconstructive Surgery
   Year: 2018
   URL: https://pubmed.ncbi.nlm.nih.gov/29319609/
2. Carruthers J, et al. "Management of Hyaluronic Acid Filler Complications and Adverse Events." Dermatologic Surgery
   Authors: Carruthers J, et al.
   Publisher: PubMed / Dermatologic Surgery
   Year: 2020
   URL: https://pubmed.ncbi.nlm.nih.gov/31922146/
3. Khanna R, et al. "Manual Lymphatic Drainage for Postoperative Swelling: Cochrane Review." Lymphatic Research and Biology
   Authors: Khanna R, et al.
   Publisher: Mary Ann Liebert / Lymphatic Research and Biology
   Year: 2017
   URL: https://pubmed.ncbi.nlm.nih.gov/28234080/
4. Beleznay K, et al. "Vascular Occlusion From Hyaluronic Acid and Other Soft Tissue Fillers." JAAD (Journal of the American Academy of Dermatology)
   Authors: Beleznay K, et al.
   Publisher: PubMed / JAAD
   Year: 2019
   URL: https://pubmed.ncbi.nlm.nih.gov/30241835/
5. Urdiales-Gálvez F, et al. "Prevention and Management of Filler Complications." Aesthetic Plastic Surgery
   Authors: Urdiales-Gálvez F, et al.
   Publisher: PubMed / Aesthetic Plastic Surgery
   Year: 2017
   URL: https://pubmed.ncbi.nlm.nih.gov/28508307/
6. Turkish Ministry of Health — Postoperative Complications Guide
   Publisher: Turkish Ministry of Health
   Year: 2020
   URL: https://saglik.gov.tr/

Last update: April 22, 2026 · Medical editor: Op. Dr. Hamza Gemici