Dark Marks After Acne (PIH): How to Fade Them, and How They Differ From Scars

The flat brown, gray or dark marks left after a pimple heals are called post-inflammatory hyperpigmentation (PIH). They are not scars: the skin is smooth, and the color comes from extra pigment made during inflammation. PIH usually fades on its own in 6 to 12 months once breakouts stop, but it can last much longer in deeper skin tones or if acne keeps coming back. Sunscreen, brightening ingredients such as azelaic acid and retinoids, and gentle peels speed fading, and controlling the acne prevents new marks.

This guide explains how to tell dark marks from red marks and true scars, how long they last, what fades them, and what to avoid.

Dark marks, red marks or scars?

Type	What it looks like	What helps
Dark marks (PIH)	Flat brown, gray or black marks; most common in medium to deep skin	Sunscreen, azelaic acid, retinoids, peels; time
Red or pink marks (PIE)	Flat red or purple marks from widened blood vessels; most visible on lighter skin	Time, sunscreen, BBL or vascular laser
Acne scars	Sunken pits or raised bumps; the texture is changed	Subcision, RF microneedling, lasers; see acne scar treatment

A simple test: run a finger over the spot. If the skin is smooth, it is a mark that will fade; if it dips or bumps, it is a scar.

Why acne leaves dark marks

Inflammation from a pimple signals pigment cells to make extra melanin. When it settles in the top layer of skin, the mark is brown and fades in months. When it drops into the deeper layer, the mark looks gray-blue and can take years. Darker skin makes more pigment in response to inflammation, so PIH is more common, darker and longer-lasting in brown and Black skin. Picking, squeezing and sun exposure all make marks darker and slower to fade.

How to fade dark marks

• Daily sunscreenThe most important step. Use a broad-spectrum SPF 30+ tinted sunscreen with iron oxide, reapplied every two hours outdoors. Without it, other treatments struggle.
• Azelaic acidFades pigment and treats acne at the same time; gentle and suitable for most skin, including in pregnancy with your doctor’s approval.
• RetinoidsAdapalene or tretinoin speed skin turnover and prevent new breakouts.
• Vitamin C, niacinamide and kojic acidBrighten and even tone; see vitamin C for skin.
• HydroquinonePrescription strength, used for limited periods under a dermatologist’s guidance; the FDA advises against most over-the-counter hydroquinone.
• Chemical peelsA series of light salicylic or glycolic peels speeds fading; see peels for dark spots.

Give any routine 8 to 12 weeks before judging it. Our hyperpigmentation guide covers other types of dark spots.

What to avoid

• Picking and squeezing pimples, which deepens and lengthens marks.
• Harsh scrubs and strong, stinging products, which inflame skin and can make marks darker.
• Lemon juice, bleach and imported “whitening” creams, which can burn skin or contain mercury or hidden steroids.
• Aggressive lasers and strong peels on darker skin without an experienced provider, as they can cause new dark or light patches.

In-office treatments for stubborn marks

• Chemical peels, chosen and strengthened gradually for your skin tone.
• BBL HERO for red marks and brown spots on fair to medium skin.
• MOXI, a gentle laser for pigment and tone that is safe for all skin tones.
• Acne treatment, including prescriptions, to stop new marks forming.

Cost at Glow Theory

MOXI is priced by area at your consultation. VIP members pay less on peels and BBL.

Dark mark treatment in Carlsbad

Our team confirms whether you have marks or scars, checks your skin type, and builds a plan to clear acne and fade marks safely. Book a visit at our studio on El Camino Real in South Carlsbad, and see our guide to Fitzpatrick skin types.