Types of Chemical Peels: Depths, Acids and What Each Treats

A chemical peel is a controlled application of an acid solution to the skin, designed to remove a precise layer of surface cells so fresher, more evenly pigmented skin can take its place. The names you see online — chemical peel, derma peel, skin peel, peeling treatment, medical peel — are all umbrella terms for this same family of procedures. What actually distinguishes one peel from another is the acid used and the depth it is taken to.

That distinction matters because "a peel" can mean anything from a fifteen-minute lunchtime treatment with no visible flaking to a medium-depth procedure with a week of structured recovery. Two patients can both say they "had a chemical peel" and have had very different experiences — which is why understanding depth is the single most useful thing you can learn before a consultation.

Superficial peels work within the epidermis — the outermost layer of skin. This group includes the alpha-hydroxy acids (glycolic, lactic, mandelic) and the beta-hydroxy acid salicylic. They brighten dull skin, soften surface pigment and marks, and help congestion, with little to no visible peeling. Because a single superficial peel removes only a thin layer, they are delivered as courses — typically four to six sessions spaced two to four weeks apart.

Medium peels reach the upper dermis. Trichloroacetic acid (TCA) at roughly 15–35% is the standard agent, sometimes prepared with a Jessner layer beforehand. Medium peels address more established concerns — stubborn pigment, texture, fine lines — at the cost of real downtime: several days of visible peeling and social planning.

Deep peels, historically done with phenol, reach further into the dermis. They are intensive procedures with long recovery and meaningful risks, and are rarely performed in modern practice — particularly on Asian skin, where the pigmentation risk is significant. Laser resurfacing has largely taken their place.

Each acid has a personality — how deep it tends to travel, what it dissolves best, and which skin it suits. This is the working vocabulary a doctor uses when selecting your peel:

Peels are surface tools. They excel at concerns that live in or near the epidermis: post-acne marks, surface pigmentation and sun damage, congestion and comedones, rough texture, and general dullness. Treated as a course, the improvement is gradual and cumulative — each session builds on the last.

What peels do not do is rebuild lost tissue. Deep pitted acne scars — ice pick, boxcar, rolling scars — sit in the dermis, below where a safe peel works. Those need different tools: subcision, fractional lasers, TCA CROSS for ice pick scars, or combination plans. A clinic that promises to erase pitted scars with a standard peel course is overselling.

Downtime scales with depth — and "peeling" is not guaranteed at the superficial end. Many light peels produce only a day or two of mild flaking, or none at all, while still working underneath.

At DrPlus, peels are doctor-selected, not menu-ordered. The doctor examines your skin type and tone, the concern you want treated, your history of pigmentation, the products you already use, and your tolerance for downtime — then matches an acid, strength and course length to that picture. Peels at the clinic are face-focused; underarm peels run within the underarm-whitening programme, and back or body peels are considered case by case.

Skin tone deserves particular weight. Asian and darker skin tones are more prone to post-inflammatory hyperpigmentation, so the safe strategy is usually a gentler acid taken through a longer course rather than one aggressive session. Slower is genuinely faster here — a PIH setback can cost months.