Skin & Regeneration
Acne Marks vs. Scars: Why the Difference Matters
After acne, a flat color change and a change in skin contour call for different descriptions. A red or brown spot with little change in height is a color change; a depression or raised area changes the contour. Both may appear in the same place. Swelling, pain, or pus may signal ongoing inflammation. One photo cannot establish a scar type or select a treatment.
- Korean public-health and hospital sources describe color changes and scars as possible, distinct changes after acne. “Acne mark” is everyday language, not a diagnosis.
- A depressed area may be an atrophic scar, a scar that sits below the surrounding skin.
- A raised scar needs closer assessment: a keloid can grow beyond the original injury’s boundary, so raised appearance alone does not separate it from a hypertrophic scar.
- Color change and a depression may coexist; a swollen, painful, pus-filled lesion may still be inflamed.
- Photos can record color but may not show texture, depth, or the original lesion’s boundary accurately.
Describe color and height separately. An area may look red but feel level with nearby skin. Another may look brown and feel sunken. Neither observation alone establishes a diagnosis.
Red or brown marks with little change in surface height
For a red or brown area level with nearby skin, start by describing its color. The Korea Disease Control and Prevention Agency (KDCA) and Asan Medical Center discuss discoloration and scarring as separate possible effects of acne. “Mark” is an everyday word, not a medical diagnosis or scar type. Include the surface description too.
Depressions change the skin’s surface
A pitted area sits below nearby skin. The Korean Dermatological Association describes pitted scars after acne; the KDCA identifies atrophic, or depressed, scarring among possible aftereffects. A single photograph cannot reliably show a depression’s depth and edges.
A raised area alone does not identify the scar type
Korean sources describe hypertrophic scars, which rise above the skin, and keloids, which the KDCA says may extend beyond the original injury. A raised appearance in a photo cannot distinguish these scar types.
A swollen, painful spot may still be inflamed
Color change and a depression can remain together. A spot that is swollen, painful, or filled with pus may still be inflamed rather than simply an old mark. The Korean Dermatological Association and Asan Medical Center describe inflammatory acne and later color or scar changes. Keep track of new lesions while describing older traces.
What a photo cannot show
A photo can record color but may miss texture, a depression’s depth, or whether a raised area extends beyond the original lesion. Lighting can make shallow contours look deeper or flatter. A photo alone cannot establish a scar type or determine treatment.
Describe color and height separately: red but level, brown and level to the touch, or visibly depressed. Note whether a raised area is growing, itching, or hurting, and whether new inflamed lesions continue. These observations convey change without making an image a diagnosis.
References
- Korean Dermatological Association, “보통여드름 (Acne vulgaris)” (in Korean). https://www.derma.or.kr/new/general/disease.php?mod=document&uid=994
- Korea Disease Control and Prevention Agency National Health Information Portal, “여드름” (in Korean). https://health.kdca.go.kr/healthinfo/biz/health/gnrlzHealthInfo/gnrlzHealthInfo/gnrlzHealthInfoView.do?cntnts_sn=3947
- Korea Disease Control and Prevention Agency National Health Information Portal, “청소년의 안전한 화장품 사용” (in Korean). https://health.kdca.go.kr/healthinfo/biz/health/gnrlzHealthInfo/gnrlzHealthInfo/gnrlzHealthInfoView.do?cntnts_sn=6622
- Korea Disease Control and Prevention Agency National Health Information Portal, “켈로이드” (in Korean). https://health.kdca.go.kr/healthinfo/biz/health/gnrlzHealthInfo/gnrlzHealthInfo/gnrlzHealthInfoView.do?cntnts_sn=3749
- Asan Medical Center, “여드름” (in Korean). https://www.amc.seoul.kr/asan/healthinfo/disease/diseaseDetail.do?contentId=31543&tabIndex=0
- Beyond Clinic YouTube video (in Korean), uploaded September 16, 2026. https://www.youtube.com/watch?v=pQ-zLGkIRcU
Frequently asked questions
Is a red mark after acne always a scar?
If only the color remains red and the surface is about level with nearby skin, a color change is a more useful description. A photograph may still miss a subtle change in the skin's contour.
Is every brown mark post-inflammatory hyperpigmentation?
Pigment change may be involved, but a color seen in a photograph is not enough to identify its cause. Lighting and the contour of the skin can change how the area looks.
Can a depression and a color change remain in the same spot?
Yes. Color and a change in surface height may occur together. Describe both separately rather than assuming one label captures the whole area.
When should a raised area be examined?
A raised area or continuing new inflammatory lesions warrant clinical assessment. A photograph alone cannot establish the scar type, especially if the area is growing, itchy, or painful.