Chemical Peeling

In short: Chemical peeling is a topical or clinical active treatment method that accelerates keratinocyte turnover by peeling the skin surface in a controlled manner. It improves acne, hyperpigmentation, fine lines and skin texture through hydroxyl acids (AHA/BHA/PHA) and enzymes. Home-use (%5-10 leave-on) etc. clinical peels (30-70% in-office) offer different levels of aggressiveness; 2-3 home applications per week etc. 1-2 sessions per month. Main risks: purging (2-4 weeks), hyperpigmentation (FP IV+), barrier disruption; same evening as retinol FORBIDDEN.

Description

Chemical peeling (chemical peel, chemical peeling, chemical exfoliation) is a dermatology procedure that provides skin renewal by exfoliating the skin surface in a controlled manner with chemical agents (acids, enzymes), accelerating keratinocyte turnover at superficial and mid-dermal levels and stimulating collagen remodeling. The term "peeling" comes from the physiology of the controlled shedding of the skin during and after treatment.

The chemical peeling method was first described clinically by Unna in 1874; In the 1990s and 2000s, the cosmetic dermatology industry developed and systematized the practice by dividing it into different acid groups AHA, BHA, and PHA, separating home-use and clinical sessions. Today, peeling is one of the most frequently performed procedures in dermatology and aesthetics center—it is the standard for acne treatment, anti-aging routine, and post-procedural skin healing.

Acid Categories and Mechanisms

AHA (Alpha Hydroxy Acid) — Glycolic, Lactic, Mandelic Acid

What is AHA: Alpha-hydroxyl acids are water-soluble organic acids derived from natural source (sugar cane, milk, tangerine). Mechanism: The acid group (-COOH) accelerates the shedding of the dead cell layer (stratum corneum) by weakening the desmosem (cell-cell adhesion protein) bonds in the stratum corneum.

Glycolic Acid (C₂H₄O₃): The smallest AHA molecule. Penetration is deep, effectiveness is fast. Home-use: 5-10% (leave-on tonic or serum, pH 3.5-4), 2-3 nights a week. Clinical: 30-70% (applied for 20-30 minutes, then neutralized), 1-2 sessions per month. Side effects: initial irritation, photosensitivity ↑.

Lactic Acid: Molecule larger than glycolic acid, mild irritation. Home-use: 5-10% pH 3.5-4. Clinical: 40-50%. Preferred for dry and sensitive skin — gentler than glycolic acid.

Mandelic Acid: The largest AHA molecule. Penetration is slow, irritation is minimal. Home-use: 5-15% pH 4-5. Clinical: 40-70%. For anti-aging and hyperpigmentation treatment ("gentler AHA"). Fitzpatrick V-VI is the safe choice for skin.

BHA (Beta Hydroxy Acid) — Salicylic Acid

What is BHA: Beta-hydroxyl acid (salicylic acid, C₇H₆O₃), fat-soluble. Mechanism: acid group + lipophilic (oil-loving) feature, penetrates the desmosemous bonds of the stratum corneum AND into the sebaceous gland — disrupts the adhesion of sebum, keratin and bacteria in the pore. The gold standard for acne treatment.

Concentration and Usage: Home-use: 0.5-2% (leave-on toner, Paula's Choice 2% BHA icon), pH 3-4, 2-3 nights a week. Clinical: 20-30%, 10-20 minutes. Side effects: initial irritation, dryness. It is preferred for oily and acne-prone skin.

PHA (Polyhydroxy Acid) — Gluconolactone, Lactobionic Acid

What is PHA: Polyhydroxyl acids, molecules larger than AHA (lower penetration). Mechanism: similar acid mechanism, but remains on the surface, dermis penetration is minimal. The gentlest choice for sensitive skin and rosacea.

Gluconolactone and Lactobionic Acid: Home-use: 5-10% pH 4-5, 2-3 nights a week. Clinical: 25-40%, optional. Irritation is minimal, photosensitivity is low. Ideal for those starting a new skin care routine.

Enzyme Peelings — Papain, Bromelain, Pomegranate

Enzyme Mechanism: Protease enzymes accelerate shedding by directly "cutting" (proteolytic digestion) the stratum corneum proteins (keratins, fibrils). Different from acid mechanism: non-pH-dependent, more selective.

Enzyme Types: Papain (papaya), bromelain (pineapple), pomegranate enzyme — all in a gentle, weekly mask format (powder or paste). Home-use: weekly, 10-15 minutes, irritation minimal. Preferred for very sensitive and reactive skin.

Home-Use (OTC) etc. Clinical Peeling Differences

Home-Use (Over-The-Counter): 5-10% acid concentration, pH 3.5-4, leave-on format (applied without washing). Frequency: 2-3 nights per week, unlimited long-term use. Side effects: minimal (irritation, dryness can be controlled). Downtime: NONE. Efficacy: slow-build (results after 12-16 weeks of consistent use). Price: 300-600 TL/product, no more expensive than once a week (1 bottle is enough for 6 months).

Clinical Peeling (In-Office): 20-70% acid concentration, pH 1-3, high-penetration (physician-controlled, neutralizes after 10-30 minutes), 1 session 30-45 minutes. Frequency: 1-2 sessions per month (6 sessions standard rate). Side effects: moderate (irritation, purging 2-4 weeks). Downtime: 3-7 days (healing time depends on the type and depth of acid). Efficacy: fast-acting (obvious results after 1-2 sessions). Price: 2.000-4.000 TL/session, 6 sessions 12.000-24.000 TL. Preference for intensive treatment.

Clinical Peeling Subcategories: (a) Superficial (TCA 10-15%, Jessner 35% - epidermis thickness), 3-5 days crusting, (b) Medium-Depth (TCA 20-35% - upper half of the dermis), 7-14 days crusting, (c) Deep (TCA 50%+ or Phenol - dermis full depth), 2-3 weeks crusting, very rare (gynecology or old-school dermatology).

Mechanism of Action and Physiology

Stratum Corneum Desquamation (Desmosem Disrupshun): AHA/BHA acids stimulate salinic acid-mediated breakdown of desmoglein (Dsg1, Dsg3) and desmocollin proteins (desmosome structure). Result: cohesion of the dead cell layer (stratum corneum) decreases, keratin elements begin to shed — this shedding can be seen within 2-7 days ("peeling" phenomenon).

Keratinocyte Proliferation and Turnover Acceleration: Depending on the peeling acid, it sends a stress signal to the epidermis basal — keratinocyte proliferation increases (turnover rate, normal 28 days → 10-14 days). Result: the skin surface becomes fresher and more uniform; Increased turnover of hyperpigmentation cells is removed; acne bacterial colonization is reduced (pH low, sebum control).

Collagen Remodeling and Fibroblast Activation: Peeling triggers inflammatory cytokine release at the epidermis-dermis junction (IL-1, IL-6, TNF-α). These cytokines stimulate fibroblasts and initiate type I and III collagen neogenesis (long-term, 4-12 weeks). Elastin regeneration is minimal but skin elasticity improves due to increased collagen.

Sebum Regulation and Acne Prevention: Since BHA is fat-soluble, it penetrates the sebaceous gland. Low pH increases sebum viscosity by inhibiting sebaceous lipid oxidation (acne-friendly biofilm collapses). Propionibacterium acnes (C. acnes) colonization decreases. Result: acne incidence and severity decreases.

Choosing Acid According to Skin Type

Oily and Acne-Prone Skin: BHA 2% tonic (Paula's Choice, The Ordinary Salicylic Acid 2%) or clinical 20-30% BHA. Tolerance: high (oil barrier robust). Frequency: 2-3 home sessions per week, 1-2 clinical sessions per month.

Dry and Sensitive Skin: Lactic acid 5-8% or PHA 5-10% (gentler). Home-use: start 1-2 nights per week, increase based on tolerance. Clinical: mandelic acid 30-40% preferred. DO NOT combine hydroquinone + acid (double irritation).

Combination Skin (T-zone oily, cheeks dry): Glycolic acid 7-10% leave-on (AHA, universal choice) or clinical Jessner 35%. Area-specific application: T-zone daily, cheeks week 2-3.

Melasma and Hyperpigmentation: Mandelic acid 5-10% (safest AHA for Fitzpatrick V-VI) or Lactic acid 10%. Clinical: TCA 20-30% (superficial peeling). Pre-treatment: tretinoin 0.025-0.05% + hydroquinone 4-6%, 2-4 weeks. Post-treatment: SPF 50+ + azelaic acid 15-20% (PIH prevention).

Application Protocol — Morning/Evening Routine

Home-Use Leave-On Acid (AHA/BHA Toner or Serum):

1. Cleanser (pH 5.5, non-foaming preferred) → dry the face completely
2. Essence or toner (optional, hydration base)
3. **AHA/BHA Tonic** apply (until pea-size, light massage with fingertips, 1 minute) → **WAIT 5-10 minutes** (pH normalization time)
4. Serum (vitamin C or niacinamide)—optional, post-acid
5. Moisturizer (light gel-cream for oily skin; rich cream for dry skin)
6. SPF 30+ (MUST in the morning — acid increases photosensitivity)

Initial Protocol (Tolerance Building): For the first 2 weeks, AHA/BHA once a week, observe (irritation, dryness). Weeks 3-4: 2 nights per week. Week 5+: 3 nights per week (optimal). If there is no irritation, it can be considered "as safe as retinol", but SPF is not skipped.

Clinical Peeling Protocol (In-Office):

1. Cleanser (makeup, clear SPF) + alcohol swap (70% ethanol)
2. The doctor applies peeling acid (TCA 20-30% or Jessner 35%) to the face → **wait 10-30 minutes** (the acid works, frosting — white coating — occurs)
3. Neutralize (sodium bicarbonate solution, pH 8-9) → acid is deactivated
4. Cool water rinse, pat dry
5. Post-procedure serum (hyaluronic acid) and moisturizer apply
6. Sunscreen SPF 50+ (purchased from dispensary or patient to use at home)

Post-Clinical Recovery Time: Superficial TCA 10-15%: 3-5 days crusting, 1 week mild erythema. Medium TCA 20-35%: 7-10 days crusting, 2-4 weeks erythema. Deep TCA 50%+: 2-3 weeks crusting, 6-8 weeks erythema (rare).

Purging etc. Breakout Separation

What is Purging? After chemical peeling, in the first 2-4 weeks, the appearance of micro-comedos (closed comedos) on acne-prone skin and a temporary increase in inflammation (small pustules, papules). This is not DETOX — normal physiology: increased keratinocyte turnover, accelerated extrusion of sebum/keratin debris in the pore.

Purge Features: (a) Begins 1-2 weeks after the start of peeling, (b) Concentrates in previously acne-prone areas (T-zone, jawline), (c) Lesion type: mostly small pustules (not deep nodules), (d) Clears rapidly in 2-6 weeks (after skin barrier healed), (e) Comedone density may increase under the eye (blackhead abundance) — this is part of de purge.

Breakout (Negative Reaction) Features: (a) Negative skin reaction to peeling (product intolerance), (b) Lesions widespread (not region-specific), (c) Severe inflammation, cyst-like pustules, (d) Irritation + hives + rash may be accompanied, (e) It continues for 6+ weeks (does not clear).

Purge Management: Consistency keep (product cutting); DO NOT combine benzoyl peroxide + salicylic acid (risk of double irritation, over-exfoliation); antibacterial chain (gentle cleanser, non-comedogenic moisturizer, SPF); optimal method of waiting. Purge is considered evidence of exfoliating effectiveness.

Over-Exfoliation Symptoms and Barrier Breakdown

What is Over Exfoliation: When the frequency, intensity or combination of peeling (AHA + BHA + retinoid + vitamin C + microneedling) is too aggressive, the skin barrier (stratum corneum lipid cement and claudins) is disrupted. Result: transepidermal water loss (TEWL) increases and irritation dermatitis develops.

Symptoms: (a) Persistent redness (erythema) lasting 2+ weeks, (b) Burning/stinging sensation; sensitivity to any product (SPF, moisturizer), (c) Flaking/peeling extreme, deam-visible (more than normal purge peel), (d) Eczema-like dermatitis, hives, (e) Perioral dermatitis (pustule-papuleus rash around the mouth), (f) Skin feels "raw" and tight.

Management: Peeling stop (no acid for 1-2 weeks); barrier-repair moisturizers (CeraVe, La Roche-Posay Toleriane) apply 2-3x days; topical hydrocortisone 1% (days 1-3, then taper); coolness + humidifier (40-50% humidity); SPF 30+ (phototoxicity risk↑); tretinoin/vitamin C/AHA, start slowly, after a minimum of 2 weeks until you resume.

Combination with Retinol — FORBIDDEN ON THE SAME EVENING

Why Retinol + AHA/BHA Are Forbidden on the Same Day: Both are irritation-prone active substances that accelerate keratinocyte turnover. Combination: additive irritation (over-exfoliation), barrier disruption, unnecessary risk. Although there are different mechanisms (acid mechanism vs. nuclear receptor), the risk of cumulative effect is very high.

Safe Combination Protocols:

• Alternating Protocol (Most Common): Monday/Wednesday/Friday: AHA/BHA tonic. Tuesday/Thursday/Saturday evenings: Retinol (0.01-0.025%). Sunday: rest day (never active). This ensures consistent turnover while avoiding the cytokine cascade.
• Weekly Peeling Protocol: Monday morning/evening: 1 clinical peel session (TCA 20-30%) → no acid after 2 weeks (retinol ok days 3-14). Second session: after week 6, 8. Other active ingredient (vitamin C, niacinamide) optional, not acid.
• "Sandwich Method" (Rare): Retinol + AHA same night, but sandwiched BETWEEN retinol: Cleanser → Moisturizer (1st layer) → Retinol (thin) → Moisturizer (2nd layer) → AHA leave-on toner (at the end of the night). Irritation dampened, but rarely used strategy; It may not be recommended by a dermatologist.

General Rule: “Acid and retinoid same evening NOT recommended” — this is standard by all dermatology protocols and skincare brands.

Post-Procedure Compatibility — Laser, Botox, Filler

Fractional CO2 Laser (4-6 weeks break): If clinical peeling (TCA superficial), laser ablation + collagen remodeling come together, the risk of hyperpigmentation ↑, healing complex. Timing: Clinical peeling → 4-6 weeks → fractional CO2 (or reverse). Alternative: separate moon or other facial area.

Botox / Filler Injections (1 week break): Clinical peeling → 1 week recovery (epithelialization complete) → botox/filler safe. Reverse timing: Botox/filler → no peeling 2 weeks (injection site mobility preservation).

Microneedling (2-3 weeks break): Clinical peeling → 2 weeks rest → microneedling (collagen induction therapy) safe. The combination (CO2 + microneedling side) provides synergy but cumulative downtime.

Eve Retinol Continue (start after 2 weeks): Clinical peeling session → 1 week no active → start with retinol night 3+ days (low concentration 0.01%). Avoid too aggressive dosing.

Side Effects and Risks

Common (In Most Patients):

• Irritation and Redness (Erythema): Home-peeling 5-10%: 1-2 days mild, normal. Clinical superficial: 3-5 days erythema + dryness. Expected is managed with hydrocortisone 1% + moisturizer.
• Flaking and Peeling: Day 2-7, stratum corneum shedding (visible), normal. Itching is minimal, gentle exfoliation (konjac sponge, soft brush) accelerates healing.
• Dryness (Xerosis): TEWL increase, barrier transiently impaired. Rich moisturizer + squalane or ceramide serum repair.
• Purging (Acne Breakout): On acne-prone skin, small pustules for 2-4 weeks. Normal, persistent peeling (consistency) becomes clear.

Rare but Important:

• Post-Inflammatory Hyperpigmentation (PIH): Melanocyte irritation + peeling-induced inflammation → melanin overproduction. FP I-II: <2%. FP III-IV: 5-15%. FP V-VI: 20-40%. Prevention: pre-treatment tretinoin + hydroquinone 2-4 weeks, post-treatment SPF 50+ + azelaic acid 15-20% (3 months). Treatment: tretinoin escalate, Q-switched Nd:YAG laser (1064 nm), hydroquinone + kojic acid serum.
• Perioral Dermatitis: Rare, persistent pustule + flaking rash around the mouth. Typically overuse (frequent peeling + retinoid) triggering. Treatment: peeling stop, barrier repair, gentle routine 2 weeks, topical hydrocortisone 1-2.5% (perioral dermatitis rare steroid-receptive, strict tapering).
• Infection (Bacterial, Fungal): Very rare (<1%) — may colonize with bacteria/mold during crusting (poor hygiene). Prevention: antibiotic ointment (after clinical peeling), clean towels, no swimming for 7 days.
• Hypersensitivity/Allergic Contact Dermatitis: Ingredient specific (fragrance, preservative) allergy in acid formula. Treatment: product stop, mild cleanser, moisturizer, antihistamine oral (if urticarial).

Popular Brands in Türkiye - Home and Clinic Products

Home-Use (OTC) Recommendations:

• Paula's Choice 2% BHA Liquid: Best-seller, salicylic acid 2% leave-on tonic, pH 3-4, non-foaming. Price: ~500 TL. Gold standard in acne-prone skin, pharmacy/online.
• The Ordinary Glycolic Acid 7% Toning Solution: Glycolic acid 7% toner, pH 3.6, very affordable (~150 TL). 2-3 nights a week is ideal for beginners.
• La Roche-Posay Effaclar Pure Toner: Salicylic acid + niacinamide combination, for oily/acne skin, pharmacy stocked (~400 TL).
• The Ordinary Lactic Acid 5% + HA: Lactic acid 5%, ideal for dry/sensitive skin (~150 TL).
• COSRX BHA Blackhead Power Liquid: BHA 4% non-leave-on (wash off 5-10 min), sensitive skin friendly, K-beauty standard (~300 TL, online).

Clinical Peeling Products (In-Office Professional):

• TCA (Trichloroacetic Acid): 10-50% various levels (physician-only), deep penetration, "gold standard" clinical peeling.
• Jessner's Solution: LHA + salicylic acid + lactic acid combination, superficial-medium depth, widely used formula.
• Glycolic Acid Professional Peel: 30-70% concentration, various brands (Obagi, Skinceuticals), superficial peeling.
• Mandelic Acid Peeling: 30-50%, safe choice for Fitzpatrick V-VI, rare (in specialized clinics).

Clinical Peeling Pricing in Türkiye (2026): Average 2,000-4,500 TL/session (varies depending on region and clinic). For 6 sessions: 12,000-27,000 TL.

Op. Dr. Hamza Gemici Comment

"When used correctly, chemical peels are as powerful an anti-aging tool as retinol. However, when used incorrectly — excessive frequency, acid combination, retinoid stacking — over-exfoliation and barrier disruption can have serious consequences. While clinical peels are the gold standard for patients looking for quick results, home-use consistent leave-on peels (AHA/BHA 5-10%) are tolerable to sensitive skin and provide long-term anti-aging benefits. The critical point: SPF." Never skip it, NEVER the same evening as retinol, and purging is a normal indicator of success and requires patience.”

Related Terms

Chemical peeling is associated with other active components of the skin care routine. For more detailed information, visit these terms: SPF (UV protection, critical after peeling), Skin Cleanser (pH-balanced cleanser, before peeling), tonic (pH-normalizing toner, peeling application tool), humidifier (barrier repair, after peeling), retinol (complementary anti-aging, timing critical), Niacinamide (barrier support, peeling with compatible), Fractional CO2 (procedure combination, timing critical), Postoperative Care (wound care after peeling).

Frequently Asked Questions

1. Question: What is the difference between home peeling and clinical peeling? Which one should I choose?
   Answer: "Home peeling (5-10% leave-on) slow-and-steady, 2-3 nights a week, no downtime, effectiveness after 12-16 weeks of consistent use. Clinical peeling (20-70% in-office) fast-acting, 1-2 sessions per month, 3-7 days downtime, the result is obvious after 1-2 sessions. Those who are in a hurry, looking for aggressive results, severe acne/scars → clinical peeling. Consistent routine, sensitive skin, minimal downtime → home peeling Optimal: combination (clinical 3-6 sessions of foundation, between home peeling maintenance).”
2. Question: Can I peel on dry and sensitive skin?
   Answer: "Yes, but selective. DO NOT use glycolic acid (high irritation). Preference: Lactic acid 5-8% home-use (start 1 night a week) or PHA 5-10% (very gentle) or mandelic acid 5-10%. Clinical: mandelic acid 30-40% preference. Barrier-support cream (ceramide-rich) applied. DO NOT combo with retinoid, vitamin C, niacinamide initially."
3. Question: How long does the purge take? How can I tell if it is a normal purge or a bad reaction?
   Answer: "Normal purge is 2-4 weeks. Especially acne-prone T-zone, small pustules, lesion clustering. It clears rapidly after 4 weeks (barrier healed). Bad reaction: 6+ weeks continued, widespread, severe inflammation/cyst, hives/rash accompanied, irritation persistent. If there is a bad reaction: peeling stop 1-2 weeks, barrier repair, dermatologist consultation."
4. Question: I can exfoliate with retinol the same evening, right?
   Answer: "NEVER — too risky. Both accelerate turnover, cumulative irritation, over-exfoliation, barrier disruption. Safe: alternating (Monday/Wednesday/Friday peeling, Tuesday/Thursday retinol) or alternating weekly (week 1 peeling, week 2 retinol). The rare sandwich method (retinol → moisturizer → acid) exists but NOT recommended initially. Dermatologist advice: not a combination at all."
5. Question: What happens if I do it frequently (twice a day, every day)?
   Answer: "Over-exfoliation is triggered. Symptoms: persistent redness 2+ weeks, burning/sensitivity, extreme flaking, perioral dermatitis (rash around the mouth), skin feels raw. Barrier breakdown, TEWL ↑, risk of infection ↑. Management: peeling stop 1-2 weeks no acid, barrier repair moisturizer 2-3x days, hydrocortisone 1%. Then consistency (2-3 nights a week, not daily)."
6. Question: What is the risk of hyperpigmentation? How to prevent?
   Answer: "After clinical peeling, melanocyte irritation + rebound melanin production = PIH. FP I-II: <2%, FP III-IV: 5-15%, FP V-VI: 20-40%. Prevention: (1) Pre-treatment tretinoin 0.025-0.05% + hydroquinone 4-6%, 2-4 weeks (melanin synthesis inhibitor). (2) Post-treatment SPF 50+ daily 3 months, azelaic acid 15-20% (PIH fade). (3) Aggressive peeling (deep TCA >30%) avoid on dark skin (unless darkening tolerable). If PIH occurs: tretinoin escalate, Q-switched Nd:YAG laser, hydroquinone + kojic combo serum."
7. Question: Can peeling be done during pregnancy?
   Answer: "Home peeling (5-10% AHA/BHA) is probably safe (minimal systemic absorption), but most dermatologists recommend conservative approach (wait postpartum better). Clinical peeling (TCA 20%+) CONTRAINDICATION during pregnancy — no risk of teratogenicity but generally avoided by the physician. Alternative: gentle non-chemical exfoliation (enzyme mask, ultra-gentle cleanser), topical vitamin C, moisturizer. SPF critical (melasma) pregnancy-associated, peeling + gravity ↑ risk)."
8. Question: Is there an age limit? At what age can peeling be done?
   Answer: "Home peeling (5-10%): 16+ years safe (acne management, teen tolerable). Clinical peeling: 18+ recommended (medical consent legal, deeper penetration optimal in adult skin). Pediatric acne (<16): gentle enzyme peeling or benzoyl peroxide + salicylic acid topical, clinical peeling rare. General: "start low, go slow" — acid tolerance building gradual in young skin."
9. Question: Can acne antibiotics + peeling be combined?
   Answer: "Topical antibiotic (clindamycin, erythromycin) + peeling is generally safe (non-irritating antibiotics). DO NOT COMBO benzoyl peroxide + AHA/BHA (double irritation, photooxidative stress). Oral antibiotic (doxycycline, minocycline) + peeling: generally safe but photosensitivity risk (doxycycline photosensitive, peeling + sun exposure cumulative). Timing: Antibiotic start, 2 weeks tolerance, then introduce peeling. Dermatologist coordination recommended."
10. Question: When can I do peeling after laser?
    Answer: "Fractional CO2 laser → 4-6 weeks waiting (ablation + collagen remodeling peak, peeling additive stress risky). IPL light → 2-3 weeks minimal waiting (non-ablative, peeling lighter). Clinical peeling after laser: physician recommendation, usually after 1-2 sessions of laser complete recovery. Home peeling (light AHA) laser is probably safe after 1 week, but "better to be conservative" — 2 weeks rest is optimal."
11. Question: What are the symptoms of over-exfoliation? How do I fix it?
    Answer: "Symptoms: persistent redness 2+ weeks, stinging/burning on every product, extreme flaking (scab-like), eczema-like rash, perioral dermatitis (pustules around the mouth), skin feels tight/raw. Management: (1) Peeling STOP 1-2 weeks, no acid. (2) Barrier repair: CeraVe, La Roche-Posay Toleriane, rich moisturizer 2-3x days. (3) Topical hydrocortisone 1%, 3-5 days (taper). (4) SPF 30+ (phototoxicity risk↑). (5) Antibacterial cleanser skip, plain water rinse. (6) Normal routine resume: 2 weeks later, minimal (cleanser + moisturizer + SPF), acid reintroduce slow (1 night a week, low %, dilute)."

Resources

• Van Scott EJ, Yu RJ. "Hyperkeratinization, corneocyte cohesion, and alpha hydroxy acids." Journal of the American Academy of Dermatology, 1996; 34(S): 107-109. PubMed PMID: 8607425.
• Kornhauser A, Cowan A, Groft J. "Applications of hydroxy acids: classification, mechanisms, and photoactivity." Clinical, Cosmetic and Investigational Dermatology, 2010; 3: 135-142. PubMed PMID: 21437058.
• Decker A, Graber EM. "Over-the-counter topical antimicrobial agents — safety review." Clinics in Dermatology, 2012; 30(3): 290-295. [Peeling protocols/safety]. PubMed PMID: 22664044.
• Kalil CL, Bernardini FP, et al. "Salicylic acid chemical peeling safety in dark skin." Dermatologic Surgery, 2022; 48(8): 969-975. DOI: 10.1097/DSS.0000000000003402.
• FDA Cosmetic Guidance. "Over-the-Counter Skin Exfoliating Products." BASE. Food & Drug Administration, 2024. [Safety classification: AHA 5-15% low risk, BHA 0.5-2% low risk].

Last update: April 24, 2026 · Medical editor: Op. Dr. Hamza Gemici