Chemical peels use a controlled application of acid to remove the outermost layers of skin, prompting the surface to renew. They are used for uneven texture, pigmentation, sun damage, acne and dullness. The depth of the peel determines both the result and the recovery.
Peels fall into three broad depths. Superficial peels (using alpha or beta hydroxy acids such as glycolic, lactic or salicylic acid) affect only the outermost layer and need little to no downtime. Medium peels (typically trichloroacetic acid) reach deeper and address more visible pigmentation and fine lines, with a recovery of one to two weeks. Deep peels (phenol) produce the most dramatic change but carry the highest risk and require medical supervision and significant recovery.
The strength, the acid used and the number of sessions are matched to your skin type and concern. This is why the same term, chemical peel, can mean a gentle lunchtime treatment or a serious medical procedure.
Superficial peels are well studied for mild pigmentation, acne and texture, and the evidence supports modest, cumulative improvement over a course of treatments rather than a single dramatic result. Medium and deep peels have stronger effects on pigmentation and photoageing, but the supporting evidence sits alongside a higher risk profile.
Outcomes depend heavily on skin type. In darker skin tones (Fitzpatrick IV to VI), deeper peels carry a documented risk of post-inflammatory hyperpigmentation, and most clinicians favour superficial peels with careful pre-treatment. Evidence quality is strongest for superficial acids and thins out as depth increases, where results become more operator-dependent.
Common and usually temporary: redness, stinging, peeling, and sensitivity to sun for days to weeks afterwards. Rigorous sun protection during recovery is not optional.
More serious, and more likely with deeper peels: burns, prolonged redness, changes in pigmentation (either darkening or lightening), infection, and, rarely, scarring. Deep phenol peels can affect heart rhythm and must be done under medical supervision.
Peels are generally not advised during pregnancy or breastfeeding, on active skin infections such as cold sores, or alongside certain medications (for example recent oral isotretinoin). A patch test and a proper skin assessment beforehand matter.
Speak to a qualified professional before a peel if you have a history of keloid scarring, active eczema or rosacea, a tendency to cold sores, darker skin prone to pigmentation changes, or if you take retinoids or photosensitising medication. After a peel, seek medical advice if you develop signs of infection (spreading redness, swelling, pus, fever), blistering beyond what you were told to expect, or pigmentation changes that do not settle. A peel should always be performed by a trained, insured practitioner after a face-to-face assessment.
Priced per session, and varies widely by depth and provider. Superficial peels are the most accessible and are usually done as a course; medium and deep peels cost considerably more per session and are fewer in number. Prices are indicative only and are not an endorsement of any provider.
NHS: skin resurfacing and cosmetic procedures guidance. British Association of Dermatologists patient information on chemical peels. Peer-reviewed dermatology literature on chemical peel depth, efficacy and safety by skin type (Fitzpatrick classification). Educational information only. Speak to a qualified healthcare professional before undergoing any procedure.