Tretinoin for Acne Scars: What to Know

Key points

Flat brown marks after acne are pigmentation, while pits and raised areas are textural scars.
Tretinoin may help acne and some surface changes but cannot be promised to remove established scars.
Active acne should be controlled to reduce the chance of new marks and scars.
Do not use tretinoin if pregnant, trying to conceive or breastfeeding.

Tretinoin may be part of acne treatment and can affect some visible changes in acne-prone skin, but it is not a universal scar treatment. Dark marks left after spots are different from indented or raised scars. Deep scars may need assessment for procedures or other treatment. Tretinoin is prescription-only in the UK, so discuss the type of mark and your options with a clinician.

Last updated: November 2026

First identify what looks like a scar

After a spot heals, a flat red, brown or grey mark may remain. This is post-inflammatory colour change, not necessarily a permanent scar. An indented rolling or boxcar scar changes the skin surface; an ice-pick scar is a narrow deep pit; a raised scar grows above the surrounding skin. These types do not respond in the same way. A clinician can help distinguish them, especially if acne is still active or the marks are changing.

Tretinoin is used as a topical acne treatment under prescription. Treating active acne can be an important part of preventing future marks. NICE guidance recommends selecting acne care according to severity and considering the impact of acne. NICE acne management guideline. The NHS also lists treatment options and notes that acne can leave scars. NHS acne treatment.

What tretinoin might improve

Tretinoin changes skin cell growth and shedding and is used for acne. Trials of topical tretinoin for acne assess acne outcomes and particular regimens, not the removal of established scars. A study of short-contact tretinoin, for example, cannot show that every scar type responds. PubMed short-contact therapy study for acne.

For a flat dark mark, the main goal may be to manage active acne, limit irritation and protect the area from sun exposure while it fades. Irritation itself can leave more pigment. For indented or raised scars, topical tretinoin alone is unlikely to remodel established scar structure enough to meet every person’s expectations. Dermatology procedures may be considered, but they carry cost, risks and skin-type considerations that need specialist discussion.

Set expectations and protect skin

There is no fixed number of weeks in which acne scars disappear. Improvement depends on whether acne is controlled, the scar type, skin response and treatment. Do not increase tretinoin frequency or strength without the prescriber. Consistent use of a tolerated treatment plan is more sensible than chasing a rapid change. If you are not sure whether a mark is a scar, seek an assessment before adding more products.

Use sunscreen and avoid tanning. Sun exposure can make pigmentation more noticeable, and inflamed skin may develop darker marks. Use a gentle moisturiser if needed. Avoid picking spots, which can worsen inflammation and scarring. If treatment causes ongoing burning, swelling, cracking or severe peeling, pause and ask your prescriber or pharmacist. Our article on tretinoin purging explains why worsening spots and irritation should be assessed separately.

When topical treatment is not enough

A dermatologist may discuss procedures for atrophic or raised acne scars after active acne is controlled. Options vary, and suitability depends on scar pattern, skin tone, medical history and the clinician’s assessment. Procedures can cause side effects including pigment change or scarring, so they are not automatic next steps. Avoid home microneedling, peels or needles on active acne or without professional guidance.

If scars are affecting your confidence, mental health or daily life, tell your GP. NICE guidance recognises the impact acne can have and supports referral in appropriate cases. A treatment plan can address active lesions and, later, residual scars. Do not assume that stronger retinoid use is the only option or that a cosmetic product can replace a clinical assessment.

Use tretinoin only as prescribed

Tretinoin is a prescription-only medicine in the UK. Use the prescribed product and follow the label. It can irritate skin, particularly when treatment begins or when combined with other actives. Keep it away from eyes and broken skin unless instructed. Do not share it with another person. Research on topical retinoids shows that the tested product, concentration and schedule matter, and irritation can affect adherence. PubMed retinoid tolerability study. A meta-analysis also reviewed tretinoin microsphere gel for facial acne vulgaris, which is evidence about acne treatment rather than a promise to remove scars. PubMed tretinoin acne meta-analysis.

Do not use tretinoin if pregnant or trying to conceive. Do not use it while breastfeeding. Tell the clinician about other acne medicines and any plans for pregnancy. See our beginner guide for practical routine basics, and consult your prescriber before changing your prescription.

Other treatments and evidence limits

The evidence pack contains studies of retinoids in acne, photodamage and related skin outcomes. Those are not interchangeable endpoints. A trial that measures wrinkles or pigmentation cannot prove treatment of deep atrophic scars. Claims of collagen stimulation should not be turned into a promise that scars will disappear. If a clinician proposes a procedure or combination treatment, ask what kind of scar it targets, what evidence applies and what risks are relevant for your skin.

Acne scar improvement is often gradual and may be partial. A useful plan defines a realistic goal, such as fewer new breakouts, less visible discoloration or a smoother appearance, and reviews progress. If the first treatment is not suitable, the plan can change under clinical guidance. Do not continue a product that causes an allergic reaction or severe irritation just because a website calls it an adjustment phase.

Further practical guidance

The difference between an active pimple and a scar also matters when choosing treatment. A new inflamed lesion may become a mark later, while a stable depression will not respond like active acne. If you have frequent painful nodules, cysts or new scars, seek clinical advice promptly. Early acne care may reduce continuing inflammation, and a clinician can discuss whether a prescription topical, oral medicine or specialist referral is appropriate.

Mark type	What it looks like	How tretinoin may fit
Flat dark mark	Colour change with a smooth surface	May be part of an acne plan; irritation and sun exposure matter
Indented scar	Shallow or deep depression	Do not expect topical tretinoin to erase established scars
Raised scar	Firm tissue above the skin surface	Needs assessment; a retinoid is not a general scar treatment
Ongoing acne	New inflamed spots or comedones	Discuss evidence-based acne treatment to reduce future marks

Tretinoin is prescription-only in the UK. Do not use it if pregnant or trying to conceive. Do not use it while breastfeeding.

Practical checks

Read the patient leaflet and check the instructions on your own prescription.
Tell a GP, pharmacist or prescriber about other medicines and skin conditions.
Use the smallest routine that meets your treatment plan, then review changes with a clinician.

Frequently asked questions

Can tretinoin remove acne scars?

It may be used as part of acne care and can affect some surface changes, but it cannot be relied on to remove established indented or raised scars. Scar type matters.

Does tretinoin fade dark acne marks?

It may be included in an acne treatment plan, but irritation can worsen pigmentation. A clinician can advise on diagnosis, sun protection and suitable treatment.

How long before acne scars improve?

There is no universal timeline. Change depends on scar type, active acne, treatment and skin response. A prescriber can set a review point.

Should I use a stronger tretinoin for scars?

No. Do not change strength or frequency without your prescriber. Stronger treatment can increase irritation without guaranteeing scar improvement.

Can tretinoin be used during pregnancy?

Avoid tretinoin if pregnant or trying to conceive. Do not use it while breastfeeding.

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