Mark or Scar? Telling Them Apart After Acne

A flat mark is only a colour change (brown, dark or red) with no change in texture; these usually fade slowly over months. A scar is a change in the skin's structure, a dent or a raised bump; it does not go away on its own, and no cream can fill a dent.

Written by the Oliareen editorial teamDermatologist review: pendingLast updated: 6 November 2026How we write

Two different things: colour and structure

What stays after acne falls into roughly two groups.

Flat marks: brown or dark (post-inflammatory hyperpigmentation, PIH) or red-pink. Run a finger over them and the skin feels smooth. Brown and dark marks are very common in brown skin.
Scars: dents where the skin has sunk (ice-pick, boxcar, rolling) or raised, thickened scars. You can feel the unevenness with a finger.

How to tell in front of a mirror

Light from the side (a window or phone torch): dents and bumps cast a shadow, flat marks do not.
Run a finger over it: smooth means a mark, uneven means a scar.
Gently stretch the skin between two fingers: rolling scars soften when stretched, ice-pick dents stay.
Both can sit in the same spot; a dent can also be brown inside.

What to expect from each

Flat marks usually fade on their own over months to a year or two, as long as new acne and sun exposure are kept down. In brown skin it takes longer. Creams cannot fill scars; procedures such as microneedling, lasers, subcision or chemical peels are done by a dermatologist, and even these improve scars rather than erase them.

Mistakes that make marks worse

Picking or squeezing spots: more inflammation, darker marks, higher scar risk.
Rubbing on lemon, toothpaste or gritty scrubs: irritation creates new brown marks.
Focusing on mark creams while acne is still active; new spots mean new marks.
Doing strong peels at home or stacking several acids.
Buying cream after cream for months for dented scars.

What to do

Control acne first: a gentle routine, and a doctor when needed. This is the biggest step against both marks and scars.
Daily sunscreen, the best-supported step for preventing PIH in studies.
For flat marks, pick one ingredient: [azelaic acid](/ingredients/azelaic-acid), [niacinamide](/ingredients/niacinamide) or [tranexamic acid](/ingredients/tranexamic-acid); give it 8 to 12 weeks.
For dents or raised scars, talk to a dermatologist; procedures tend to work better once acne is calm.

Limits of the evidence

A 2024 systematic review (48 studies, most participants with brown skin) found acne was the leading cause of PIH, and complete clearing was uncommon. Most evidence for mark-fading ingredients comes from small studies. So do not trust claims like “marks gone in 7 days”.

Questions people ask

Are red marks different from brown marks?

Yes. Red marks come from small blood vessels, brown marks from extra pigment (melanin). Both are flat and usually fade with time; brown marks darken more in the sun.

Can any cream remove dented scars?

No. Creams work on colour and the top layer; they cannot fill a sunken dent. Scars need procedures from a dermatologist.

Do marks fade on their own?

Flat marks usually do, but slowly: months to a year or two. Less sun and fewer new spots shorten this. No one can promise an exact time.

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