What is a chemical peel and how does it work?
A chemical peel works by applying an acid solution that separates the upper layers of skin in a controlled way, after which the skin forms a new surface. The type of solution, its strength and the contact time determine the depth of action. The aim is to improve surface texture, colour and appearance.
During a peel the skin is first degreased, the chosen solution is applied for a set time and, when needed, neutralised or rinsed off. The solution loosens the bonds holding dead cells together, and in deeper peels it also starts a renewal response in the upper dermis. After the shedding, the skin can look smoother and more even in tone.
Peel is not a single product but a name for different chemicals at different depths. Low-strength products used at home and medical peels applied under a doctor's supervision are therefore not the same thing. The solution and strength are chosen according to skin type, the goal and how much recovery time is available.
What is the difference between superficial, medium and deep peels?
A superficial peel affects only the top layer, heals quickly and is usually done as a series. A medium peel covers the whole epidermis and part of the upper dermis, giving a stronger effect but longer recovery. A deep peel reaches further into the dermis and is considered only under close medical supervision in special conditions.
Superficial peels aim for mild shedding, freshness and fine texture correction, and often come up for acne-prone skin and mild discolouration. Sessions are generally repeated a few weeks apart and daily life can usually continue without a break. Medium-depth peels cause marked flaking and crusting; they are considered for more pronounced pigmentation, sun damage and fine lines, and recovery may take up to a week or more.
Deep peels produce an intense effect but carry clearly higher risks, including systemic effects, lasting colour change and scarring, which are discussed mostly in this group. They are therefore regarded as special procedures needing monitoring, and in aesthetic practice the choice always depends on individual assessment. Specific solutions and strengths are not given on this page; they are the doctor's decision.
Which concerns is a peel considered for, and where does it fall short?
A peel is considered for acne-prone skin, sun spots, mild discolouration, fine surface lines and dull texture. On its own it falls short for deep wrinkles, marked sagging and deep acne scars. For melasma it is used in a limited and careful way.
Superficial peels can help with clogged pores and mild post-acne marks in oily, acne-prone skin, and are also used for fine lines and loss of radiance. For sun spots and uneven surface tone, medium-depth methods may come into the discussion. See the pigmentation page for how spot types are told apart.
Sagging and volume loss are not corrected by peels; in that case heat-energy or injectable approaches are assessed. On deep depressed scars a peel may soften the surface but will not remove the depression. In melasma, a peel can sometimes trigger the spots, so suitable preparation and a low-strength approach are needed. The right expectation and method come from the examination findings.
How does skin look after a peel and what should be observed?
After a peel the skin may be red, tight and dry, and may flake or crust over a few days. Not picking at crusts and using the moisturiser and sunscreen the doctor recommends are the basis of healing. Sun exposure can raise the risk of pigmentation.
After a superficial peel the skin is usually mildly red and dry for a few days, followed by fine flaking. With a medium-depth peel the shedding is heavier and crusting, temporary darkening and swelling can occur. Picking at flaking skin or pulling off crusts raises the risk of pigmentation, infection and scarring, so the skin should be allowed to shed naturally.
During recovery, products that could irritate the skin, sun and sunbeds are generally avoided. Broad-spectrum sunscreen should be used regularly during healing and afterwards. The doctor will say which products to restart and when. If severe pain, yellow fluid, spreading redness or fever develops, contact the treating doctor without delay.
Who should not have a peel, and what are the risks?
Pregnancy and breastfeeding, active infection or cold sores, open wounds, recent sunburn and some medicines may mean a peel should be postponed or changed. The main risks are pigmentation changes, prolonged redness, infection, cold-sore flare-ups, burns and, rarely, scarring. The risk rises as depth increases.
People taking oral isotretinoin, those who recently had laser or another resurfacing procedure, those with an active cold sore or skin infection and those allergic to peel ingredients must tell the doctor; in some cases the peel is postponed or another method is chosen. A tendency to keloids and a history of poor healing are also assessed. Some peel types are generally not preferred in pregnancy.
In darker skin the risk of brown discolouration after inflammation is higher, so lighter solutions, preparation and strict sun protection are needed. A peel should be treated as a medical procedure rather than a salon treatment and done in a licensed setting. Your suitability is assessed at the examination.
Frequently asked questions
How many sessions does a chemical peel take?
Superficial peels are often planned as a series a few weeks apart, while medium-depth peels are done less often and in fewer numbers. The number needed varies with the goal, skin type and response. The plan is updated at each review.
Is crusting after a peel normal?
Yes, particularly after medium-depth peels, flaking and crusting over a few days are an expected stage of healing. Crusts should not be picked off. Marked pain, pus, fever or rapidly spreading redness is outside the expected course and should be reported to the doctor.
Can I have a peel in summer?
Because sun exposure raises the risk of post-peel pigmentation, medium-depth peels in particular are often postponed or planned more gently in strong-sun months. Even a superficial peel should be combined with regular sun protection. Timing is set with the doctor.
Do peels shrink pores?
A peel can make pores look less prominent by reducing plugs inside them and dead cells on the surface. It does not fundamentally change pore structure, and the effect is limited and temporary. See the enlarged pores page for more detail.
Do home peel products replace a clinic peel?
Low-strength home products can give a light surface treatment but lack the depth and control of a clinic peel. Overuse can cause irritation, a damaged skin barrier and pigmentation. It is sensible to ask the doctor which product to use and how often.
This content is for general information and does not replace a personal medical assessment.