TCA Peel
A chemical peel using trichloroacetic acid. Depending on the strength it is either a light peel with a few days of flaking or a medium peel with a week of visible healing. It carries the highest pigment risk of the peels in common use.
Key facts
Treats
Selected scars, lines or sun damage
Recovery
Days to a week; depth-dependent
Treatment plan
Often 1–3 sessions
Typical cost
Per-session quote; depth affects cost
What is it?
It is a chemical peel.
Trichloroacetic acid removes selected layers of skin.
Depth varies.
Formulation, application and technique set the depth.
It is not a home treatment.
Online acid products should not be used to copy it.
History matters.
Pigment-prone skin, herpes and scarring history need assessment.
What it treats
Ice Pick Scars
TCA CROSS raises deep pits.
Sun Spots
Clears spots.
Wrinkles and Fine Lines
Medium peels smooth lines.
Actinic Keratosis
Removes sun damage.
Melasma
Deep peels can darken patches.
Rosacea
Very irritating.
Treatment areas
TCA Peel
Face; the selected area depends on the concern and treatment plan.
TCA Peel
Face; the selected area depends on the concern and treatment plan.
Skin tones
Lighter skin
Low risk
A week of peeling for medium depth.
Medium skin
Some risk
Dark marks are common; pre-treatment helps.
Deeper skin
Higher risk
Highest pigment risk of common peels; spot TCA CROSS is safer than full-face.
How it works
Diagram explanation
TCA is applied to selected skin: A clinician chooses the formulation and treatment plan. A controlled injury forms: The acid coagulates proteins in the treated layers. Skin heals and renews: The response depends on peel depth, technique, and skin.
Schematic illustration. Technique and response vary. This explains a mechanism and does not specify treatment settings.
Types
TCA peels range from light to medium depth depending on strength. A highly concentrated version, called TCA CROSS, is dabbed into individual scars rather than spread across the face.
Light TCA
A gentle all-over peel for tone and texture.
- Strength
- 10–20%
- Downtime
- 3–5 days
- Sessions
- Several, a month apart
- Good for
- Uneven tone, mild sun damage
Medium TCA
A deeper peel for visible sun damage and lines.
- Strength
- 25–35%
- Downtime
- 7–10 days
- Sessions
- Usually 1
- Good for
- Sun spots, fine lines
TCA CROSS
High-strength acid placed into single scars.
- Strength
- 70–100%
- Downtime
- 5–7 days of small scabs
- Sessions
- 3–6, a month apart
- Good for
- Ice pick scars
Before your treatment
2–4 weeks before
4 weeks before: Sun and pigment prep: No tanning or sunburn for a month, or the peel leaves blotchy pigment.
4 weeks before: Sun and pigment prep: On deeper skin tones and with melasma, providers pre-treat 2 to 4 weeks with a pigment-blocking cream.
2 weeks before: Actives and hair removal: Stop retinoids, benzoyl peroxide and exfoliating acids 5 to 7 days before.
2 weeks before: Actives and hair removal: Stop waxing, threading and hair removal creams for 2 weeks.
The week before
1 to 2 days before: Antiviral: Antiviral medicine starts a day or two before a medium peel, whether or not you get cold sores.
Day of treatment
Arrival & prep
Skin is checked and photographed, and antiviral medicine started if it has not been.
Treatment
Skin is cleaned and degreased, eyes and lips protected.
The acid goes on with gauze or a brush, section by section, each area watched for frosting before the next layer. No neutralizing step; cool compresses follow. A light peel takes about 20 minutes, a medium 30 to 45. Medium TCA is genuinely uncomfortable, worst early.
Before you leave
Frosting fades within about 15 to 30 minutes, leaving skin bright red and swollen.
After your treatment
First 24 hours
Days 1 to 3: Skin turns brown or bronze and feels stiff and leathery.
Days 2–7
Days 3 to 10: Skin cracks and comes away in sheets, often starting at the mouth.
Weeks 2–4
Weeks 2 to 6: Pinkness settles over several weeks and takes makeup once skin is intact.
Time to results
1–2 weeks after peeling
How long results last
Months to years
Risks
A light TCA peel behaves like other superficial peels
stinging, redness, a few days of flaking. Risk climbs steeply with depth, and medium-depth TCA carries the highest chance of lasting pigment change of any peel in common use.
Dark patches
New brown or gray patches in the weeks after, most common on deeper skin tones, after sun, and with melasma. Treat early; they clear slower the longer they sit.
Pale patches
Areas that heal lighter than the surrounding skin. These can be permanent, and they are why medium peels are used cautiously on deeper skin tones.
Prolonged redness
Pinkness beyond about 6 weeks, or redness getting worse.
A cold sore outbreak
Worth preventing before a medium peel. Report tingling, clustered blisters or pain early.
Skin that will not close
Any area still raw past about day 10.
Cost
Typical cost
Per session; more for medium depth
Pricing
In the US a light TCA peel runs about $150 to $300 a session and a medium peel about $400 to $900, more for a full face with sedation.
Insurance
Insurance does not cover peels for pigment, texture or scarring.
Alternatives
Glycolic acid peel
Gentler, neutralized on a timer, essentially no downtime. Better for dullness and surface marks and much easier to repeat, with less effect on texture and deeper pigment.
Salicylic acid peel
Superficial and oil-soluble, aimed at active acne rather than sun damage or texture. Very low risk, and correspondingly limited depth.
Fractional laser resurfacing
Similar territory to a medium peel for texture and lines, with more precise depth control and often a better safety margin on deeper skin tones. Costs more and needs a device.
Microneedling
Reaches indented scars and texture with far less pigment risk, but does much less for sun spots and surface pigment. Often combined with TCA CROSS rather than chosen instead of it.
Subcision
For tethered rolling scars specifically, releasing the bands underneath. It does nothing for pigment and pairs with scar-directed TCA rather than replacing it.
Topical retinoid plus pigment cream
Used at home, it is slower and cheaper, and needed either way to hold a peel result. For mild pigment this is often enough on its own.
Leave-on acids, glycolic 5 to 10% or salicylic 0.5 to 2%
The realistic daily substitute for the surface part of the job. Slower, far cheaper and much safer.
Topical retinoid
The most reliable home treatment for texture, fine lines and post-acne marks, and standard pre-treatment before a peel.
Pigment-blocking creams
For brown patches these do most of the work. A peel speeds the process up rather than replacing them.
Daily sunscreen
The single thing that decides whether a peel result lasts. Skipping it after a TCA peel undoes the peel.
Questions
What is frosting?
The white film that appears as TCA coagulates protein. It is the intended endpoint and how the provider judges depth. Patchy frost means a superficial peel; a solid white sheet means the upper dermis.
How is TCA CROSS different from a TCA peel?
Same acid, different procedure. TCA CROSS places a high strength into the base of individual icepick scars and leaves the rest of the skin alone. A peel treats the whole area at much lower strength. If icepick scars are why you are going, ask for TCA CROSS by name.
How much downtime should I plan for?
About 3 to 5 days for a light peel, 7 to 10 for a medium one, plus several weeks of fading pinkness. Plan the week off before you book.
Is TCA safe on deeper skin tones?
Light TCA and TCA CROSS are used on all skin tones. Medium-depth TCA across the face risks lasting dark or pale patches on deeper skin tones, so many providers choose a course of lighter peels instead.
Why is there no neutralizer?
TCA is used up as it reacts, so it stops on its own. Water rinses the surface but does not undo the reaction underneath. That is why it goes on in slow layers and is judged by frosting.
Will it get rid of my acne scars?
A face peel improves discoloration and texture but does not lift indented scars. Icepick scars may respond to TCA CROSS; rolling and boxcar scars usually need subcision, needling or laser.