The basic approach is to have a peel at a clinic where the provider examines your skin type and concerns during consultation, then selects the type and strength of the chemical agent accordingly.[1][2]This is important because deeper peeling increases not only the effect but also the recovery time and the likelihood of complications.[2]This is especially important for skin prone to post-inflammatory hyperpigmentation (brown marks left after inflammation), which requires caution with deep peels.[3][4].
Does the clinic examine your skin type before choosing the agent?
The first thing to look for is whether the provider examines your skin before deciding on the chemical agent. Expert consensus recommends selecting the type and concentration of the agent based on your skin type, the nature of your concerns, and how your skin has responded to previous treatments.[1].
It is known that people with darker skin tones are more prone to post-inflammatory hyperpigmentation, and when it occurs, it tends to persist longer.[5]For this reason, lighter to medium-depth peels are more commonly chosen.[1].
Does the clinic explain the depth differences and the reasons?
Another point of comparison is whether the provider explains the differences in depth and the reasoning behind them. Shallow peels are considered relatively safe for all skin types, whereas deep peels require specialized experience.[1].
With medium-depth peels such as 35% TCA (trichloroacetic acid), risks of post-inflammatory hyperpigmentation and prolonged redness have been reported.[4]On the other hand, for depressed acne scars, there is a method of applying concentrated TCA only to the scar areas in a spot pattern (TCA Cross), and this approach has been reported to have fewer complications.[4]Remember that even though they are both called "peeling," different application methods and depths constitute different treatments.
What preparation is needed before the procedure, and what care is needed afterward?
The results of a peel depend not only on the treatment itself but also on care before and after. For melasma (hyperpigmentation appearing symmetrically on the cheeks), preparing the skin with topical medication beforehand and continuing the topical medication after the procedure are important to prevent post-inflammatory hyperpigmentation.[3]There are also reports that melasma fades faster and more effectively when topical medication is combined with the peel.[3].
With TCA peels, post-inflammatory hyperpigmentation after sun exposure is one of the commonly reported complications.[6]The treated area may sting or burn during the procedure, but in most cases this settles by the end of the treatment.[6]Ask in advance when to start using sunscreen and how to use it.
Are there times or skin conditions when you should not have a peel?
Depending on your skin condition, it may be better to postpone the procedure. Dermatology textbooks list as conditions to consider carefully: people who have had medium to deep peels within the past 3–12 months, those prone to hypertrophic scarring, and those who have undergone radiation therapy.[2]The same caution applies if you have rosacea, dermatitis, psoriasis, or vitiligo.[2].
Possible complications include prolonged redness, uneven color or skin texture, infection, delayed healing, and scarring.[2]Make sure the provider takes a detailed medical history during the consultation, asking about previous treatments and any skin conditions.
Where should I have it done? Guidelines when you are unsure
During your consultation, ask about the following points:
Skin type: Does the provider examine whether your skin is prone to post-inflammatory hyperpigmentation?[1][5]
Agent and depth: Does the provider explain the type and depth of the chemical agent based on your concerns?[1][4]
Care before and after: Are there instructions for skin preparation beforehand and guidance on topical medication or sunscreen after the procedure?[3][6]
Medical history: Does the provider confirm recent treatment history and any skin diseases?[2]
You cannot determine which agent and depth are right for your skin based on an article alone. During your consultation, tell the provider about your specific concerns and how your skin has responded to previous treatments, and discuss the strength of the agent and care before and after with your doctor.
- 1Lim HW, Zhang C, Taylor M, Dlova NC, Conceição K, Jablonski N, Gupta N, Wangari-Olivero J, Alexis A. International Expert Consensus on Knowledge Gaps in Care for Dermatologic Disorders in Skin of Color. International Journal of Dermatology. 2025. doi:10.1111/ijd.70101
- 2Bolognia Dermatology, 5th ed. Chapter 154 Chemical and Mechanical Skin Resurfacing (The degree of improvement, recovery period, and propensity for complications are proportional to the depth of skin injury and skin type. Complications include prolonged erythema, uneven coloration or texture, infection, delayed healing, and scarring. Relative contraindications include moderate to deep resurfacing within 3–12 months, tendency toward hypertrophic scarring, history of radiation therapy, rosacea, dermatitis, psoriasis, and vitiligo).
- 3Sarkar R, Arsiwala S, Dubey N, Sonthalia S, Das A, Arya L, et al. Chemical Peels in Melasma: A Review with Consensus Recommendations by Indian Pigmentary Expert Group. Indian Journal of Dermatology. 2017. doi:10.4103/ijd.IJD_490_17
- 4Bhargava S, Cunha PR, Lee J, Kroumpouzos G. Acne Scarring Management: Systematic Review and Evaluation of the Evidence. American Journal of Clinical Dermatology. 2018. doi:10.1007/s40257-018-0358-5
- 5Mar K, Khalid B, Maazi M, Ahmed R, Wang OJ, Khosravi-Hafshejani T. Treatment of Post-Inflammatory Hyperpigmentation in Skin of Colour: A Systematic Review. Journal of Cutaneous Medicine and Surgery. 2024. doi:10.1177/12034754241265716
- 6Sitohang IBS, Legiawati L, Suseno LS, Safira FD. Trichloroacetic Acid Peeling for Treating Photoaging: A Systematic Review. Dermatology Research and Practice. 2021. doi:10.1155/2021/3085670