Peel or microdermabrasion. Chemical or mechanical.

Both treatments remove the layer of dead cells sitting at the surface of the skin. Both get called exfoliation. That is where the similarity stops.

A chemical peel works chemically. An acid solution — glycolic, lactic, salicylic and mandelic are the common ones — is applied to clean skin, left for a set time, then removed. It loosens the bonds holding surface cells to one another. Over the days that follow, those cells lift away on their own.

Microdermabrasion works mechanically. A fine diamond-tipped handpiece, or a stream of fine crystals, passes over the skin under vacuum. The tip loosens the surface cells by contact and the vacuum draws them away in the same pass.

The timing difference matters more than people expect. Microdermabrasion is finished when the appointment is. A peel is only started by it — the skin finishes the job over the following days, on its own schedule rather than yours.

Depth is the axis worth comparing on, and it runs one way. A peel can be taken deeper than microdermabrasion reaches. Microdermabrasion cannot be taken deeper at all — the ceiling is built into the method, which is a limitation and also the reason it suits some people.

Reactive skin is the clearest split of the two. Skin that flushes easily, stings with actives at home and takes hours to settle often tolerates microdermabrasion where a peel would be too much. The reason is not that abrasion is inherently kinder.

The reason is that its depth is fixed and shallow, and nothing is left on the skin working after the appointment ends. A peel has a strength and a contact time, and reactive skin is precisely the skin that responds to both unpredictably. Removing that variable is the difference.

Microdermabrasion tends to suit surface dullness, rough texture, makeup that sits badly, skin that has not tolerated acids, and anyone who cannot give several days to flaking. It is modest, repeatable work, and modest is not a criticism.

A peel tends to suit congestion, the look of surface pigment, and uneven tone — particularly on skin that already tolerates acids at home without complaint. It asks more of the skin and it can be pointed at more.

Neither is a rule. They are the usual starting positions, and an assessment exists because the usual position is wrong often enough to matter.

Microdermabrasion has no significant downtime. Skin is usually flushed and a little tender, similar to mild sunburn, for a few hours to a couple of days. Normal activity carries on straight away. Keep the treated skin out of direct sun while it settles.

A peel depends entirely on depth. Superficial peels carry little to none. Medium and deeper peels ask more: skin can look flushed, feel tight, and visibly flake over the days that follow. No makeup for at least 24 hours, and out of direct sun while it settles.

The flaking is the part people underestimate. It is not a complication — it is the treatment finishing. It also cannot be hurried, which is why the timing of a deeper peel is planned against your calendar before it is booked rather than after.

If a clinic tells you a peel has no downtime, they are describing a superficial peel and not saying so. It is the kind of half-answer that puts someone in the chair three days before an event.

A comparison page has an obvious bias: it assumes one of the two is the answer. Often enough, neither is, and the most common reason is dull. The skin is already being exfoliated too much at home.

A routine with an acid toner, a scrub and a retinol product in it is already running three forms of exfoliation. Adding a fourth in a clinic is one of the more common ways people spend money making their skin worse while sincerely trying to improve it. The cost is a few hundred dollars and a month of undoing it — not a disaster, just an avoidable waste.

Other times the answer is neither because the goal sits elsewhere. Indented scarring that has fully matured is microneedling territory, over a course. Anything that needs a name — a persistent rash, a mole that has changed — goes to a doctor first. We do not identify those, and we say so rather than treat around them.

And a reasonable proportion of consultations end with a change to skincare and nothing booked. That is not a failed appointment. It is often the one that saves the most money.

This page can tell you what each treatment is and what it asks of skin. It cannot tell you what yours has already been asked to tolerate, which is usually what decides.