Post-acne marks: what causes them and how to help visibly fade them

Post-acne marks are flat areas of discoloration that can remain after a pimple heals.

Depending on your skin tone, they may appear red, pink, brown, gray, or purple. Unlike acne scars, post-acne marks do not change the skin's texture and often visibly fade gradually over time.

Acne may disappear, but the skin's healing process can continue long after a breakout is gone. This can leave visible marks even when the blemish itself has cleared.

Post-acne marks develop when inflammation from a breakout triggers changes in the skin during healing.

As a pimple heals, the skin may produce excess melanin or experience lingering redness, resulting in visible discoloration after the blemish is gone.

Picking, squeezing, or popping pimples can increase inflammation and may make post-acne marks more likely to develop.

The color of a post-acne mark depends on how your skin responds to inflammation.

Red or pink marks are often associated with lingering inflammation and are more common in lighter skin tones. Brown, gray, or purple marks—often called post-inflammatory hyperpigmentation (PIH)—develop when inflammation triggers excess melanin production.

People with medium to deep skin tones are generally more likely to develop PIH after a breakout. Because post-inflammatory hyperpigmentation is more common in medium to deep skin tones, early acne treatment and daily sunscreen use may be especially important for helping prevent post-acne marks from becoming darker and more noticeable.

Yes, many post-acne marks visibly fade gradually over time, but the timeline can vary from person to person.

Some post-acne marks may improve within months, while others can persist for longer depending on factors such as skin tone, the severity of inflammation, and sun exposure. Wearing sunscreen daily and treating acne consistently can help support a more even-looking complexion over time.

A consistent skincare routine that treats acne, supports skin renewal, and protects against UV exposure can help improve the appearance of post-acne marks over time.

Dermatologists commonly recommend these strategies:

• Use a retinoid regularly. Retinoids support consistent cell turnover, which helps even out tone and gradually help improve the appearance of uneven skin tone over time.
  A good fit for acne‑prone skin: Neutrogena® Evenly Clear™ Retinoid Adapalene Gel, designed to help prevent breakouts while visibly improving the appearance of post-acne marks.

• Smooth and refine with salicylic acid. SA helps remove excess oil and buildup that can contribute to clogged pores and future breakouts.

An everyday option: Neutrogena® Oil‑Free Acne Wash, which helps keep pores clear while supporting a more even look over time.

• Wear sunscreen daily. UV exposure can darken post‑acne marks, so SPF is an absolute must.
  A lightweight, invisible option: Neutrogena® Ultra Sheer® Sunscreen, designed to feel weightless while providing essential protection.

• Support your skin barrier. Keeping skin hydrated helps support a healthy skin barrier, especially when using active ingredients. Using a moisturizer can help reduce dryness and maintain skin comfort while supporting your overall skincare routine.

A great barrier friendly choice: Neutrogena® Hydro Boost Gel Cream, which replenishes hydration with hyaluronic acid and helps strengthen the skin moisture barrier over time.

Treating acne early and avoiding unnecessary inflammation can help reduce the likelihood of developing post-acne marks.

Consistently managing breakouts may help prevent new marks from forming while supporting clearer-looking skin over time.

To help prevent new marks from forming:

• Treat acne consistently.

• Avoid picking, squeezing, or popping blemishes.

• Wear sunscreen every day.

• Follow product directions when using acne treatments.

Consider seeing a dermatologist if your acne is persistent, severe, causing scars, or leaving marks that concern you.

A dermatologist can help determine whether you're dealing with post-acne marks, acne scars, or another skin concern and recommend a treatment plan that's right for your skin.