TCA Peel Strengths (15%, 25%, 35%): Depth, Results and Recovery

Trichloroacetic acid (TCA) peels range from superficial to medium depth depending on concentration and technique. The short answer: lower strengths treat dullness and mild pigment; around 35% (often combined with another agent) reaches medium depth for sun damage, fine wrinkles and some scars, with about a week of peeling. Higher strengths should be done by experienced clinicians, especially on darker skin.

Strength guide

Strength	Typical depth	Common uses	Downtime
10 to 15%	Superficial	Dullness, mild pigment	A few days of flaking
20 to 25%	Superficial to light-medium	Pigment, fine lines	Several days
35% (often with Jessner's or glycolic)	Medium	Sun damage, wrinkles, some scars	About a week
Focal high strength (TCA CROSS)	Spot treatment	Icepick scars	Days

Depth also depends on skin preparation, number of coats and skin type, not just percentage. A review describes chemical peels as useful office tools with careful patient selection (Truchuelo et al., Actas Dermosifiliogr, 2017), and an acne scar review lists TCA among treatments with very good results (Chilicka et al., J Clin Med, 2022).

Recovery for a medium-depth TCA peel

Day	What to expect
0 to 1	Stinging, redness, tightness
2 to 3	Skin darkens and tightens
3 to 7	Peeling and flaking
7 to 10	New pink skin; makeup when healed
Weeks	Redness fades; strict sun protection

Risks

• Post-inflammatory hyperpigmentation, more likely in darker skin (Davis and Callender, J Clin Aesthet Dermatol, 2010)
• Infection or cold sore flare (antivirals are often prescribed)
• Prolonged redness
• Scarring with deeper peels or poor technique

Darker skin

Lower concentrations and pre-treatment are usually advised; a 2025 study examined sequential glycolic acid and TCA peels in skin of color (Maruma et al., Int J Womens Dermatol, 2025). Choose a provider experienced with your skin type.

Why not at home?

High-strength TCA sold online can burn and scar. Leave medium-depth peels to professionals.

Aftercare

Gentle cleansing, bland moisturizer or ointment as instructed, no picking, and broad-spectrum sunscreen (AAD: sunscreen FAQs).

How often do complications happen?

One of the largest published case series reviewed 923 TCA peels done over almost 20 years in patients with light and dark skin, using a careful layer-by-layer technique. Complications were uncommon:

Complication	Rate
Persistent hyperpigmentation	5.9%
Mild visible blood vessels	0.3%
Herpes (cold sore) flare	0.2%
Staph infection	0.2%
Hypopigmentation	0.1%

Source: Fanous and Zari, JAMA Facial Plast Surg, 2017. This was one surgeon group's experience, not a controlled trial, so results elsewhere may differ. The most common problem, darkening, is also the main concern for people with darker skin. It's a reason to ask about pre-treatment and whether a lighter peel would do the job.

Frequently asked questions

How often can I get a TCA peel? Superficial peels every few weeks; medium-depth peels months apart.

Does TCA help acne scars? Yes, particularly as TCA CROSS for icepick scars.

Is a 35% TCA peel painful? It stings during application; providers manage discomfort.

This article is for educational purposes only and is not medical advice. Talk to a board-certified dermatologist about your situation.

Sources

• Truchuelo M et al. Chemical peeling: a useful tool in the office. Actas Dermosifiliogr. 2017. PubMed
• Chilicka K et al. Methods for the improvement of acne scars: a review. J Clin Med. 2022. PubMed
• Davis EC, Callender VD. Postinflammatory hyperpigmentation. J Clin Aesthet Dermatol. 2010. PubMed
• Maruma F et al. Sequential high concentration glycolic acid and trichloroacetic acid chemical peels. Int J Womens Dermatol. 2025. PubMed
• American Academy of Dermatology. Sunscreen FAQs