How does a chemical peel work?

Controlled, deliberate injury — or in one case, controlled removal. The whole category works by provoking the skin's own repair response, and the skill is entirely in the control: enough to trigger repair, not enough to cause damage the skin does not fully recover from.

Microneedling makes hundreds of tiny vertical channels through the epidermis into the dermis. A chemical peel applies an acid at a concentration that separates and lifts a measured depth of skin. Dermaplaning is different in kind — it removes the outermost dead layer and the fine vellus hair with a blade, without injuring living tissue, which is why it has no downtime and no collagen effect worth claiming.

The depth reached is the entire variable. It decides what a treatment can improve, how long you are red for, and how much risk you are taking. A deeper treatment is not a better treatment; it is a different treatment with a different recovery, and matching depth to the problem is most of the job.

The moment the skin registers injury it starts a sequence that has been the same for as long as we have had skin. First inflammation — the redness and heat in the hours afterwards, which is the response working rather than a side effect. Then proliferation, over the following days, as fibroblasts migrate in and lay down new collagen. Then remodelling, over weeks to months, as that new collagen is reorganised into something stronger and better aligned than what was there.

The remodelling phase is why the result of a resurfacing treatment is not the result you see when the redness settles. Real improvement in texture and scarring appears from around four weeks and continues for three months. Judging it at day seven is judging inflammation.

It is also why a course beats a single session for anything structural. Each treatment restarts the cascade; the improvements accumulate. One session gives you a glow, which is a real but temporary consequence of increased blood flow and a freshly cleared surface.

SUPERFICIAL peels work within the epidermis. They brighten, smooth and even out tone, they suit most skin types, and recovery is a few days of light flaking at most. They are the peels done as a course.

MEDIUM peels reach the upper dermis and address more established pigmentation, fine lines and some scarring. Visible peeling for around a week is expected, and the assessment beforehand matters considerably more.

DEEP peels are a different category of intervention with a different risk profile and are not offered here.

Depth is chosen from your skin type, what you are trying to change and what recovery you can actually accommodate — not from what sounds most impressive.

It breaks the bonds between skin cells, so a controlled thickness of skin separates and lifts. Underneath, the repair response covered above lays down new collagen and pushes fresher cells up.

Different acids do this differently: alpha hydroxy acids like glycolic work on the surface and are water-soluble; salicylic acid is oil-soluble so it gets into pores and suits oilier, congested and acne-prone skin; trichloroacetic acid goes deeper. Choosing between them is the assessment.

Not everyone visibly peels, and how much you flake is not how well it worked. Some of the best results come from skin that barely shed at all.

It cannot change the shape of anything. Resurfacing improves the surface and the quality of the skin; volume, structure and descent are untouched by it.

It cannot fix pigmentation caused by ongoing sun exposure or by an underlying condition, and in darker skin types an over-aggressive treatment can cause pigmentation rather than clear it. That risk is real, it is assessed beforehand, and it is a reason to be wary of a clinic that offers one protocol to everybody.

And it cannot outrun what you do afterwards. A resurfacing course without daily sun protection is money spent undoing itself, which is the least popular sentence in aesthetics and one of the truest.