What causes atrophic scars?

These scars sit below the surrounding skin because the deeper layer has not rebuilt its normal framework. Acne is a very common cause, particularly when inflamed spots damage the skin or are repeatedly picked. Chickenpox and other injuries or inflammatory skin problems can also leave depressed marks. The scar may look like a narrow deep pit, a wider shallow depression or an uneven wave across the skin. Its colour and texture can change as it matures, but the indentation reflects altered structure rather than dirt or poor washing.

Do not squeeze active spots or pick healing crusts, since repeated trauma can deepen scarring. Use gentle cleansing, moisturiser and daily broad-spectrum sun protection to reduce contrast between a scar and the surrounding skin. If acne is still active, treating new inflammation can help prevent additional scars. A dermatologist may discuss options such as microneedling, laser treatment, subcision, chemical procedures or carefully selected fillers. Suitability depends on scar shape, skin tone, acne activity and healing history.

Seek assessment if new depressions are appearing, scars are changing quickly, or acne remains inflamed despite routine care. A review is also sensible if a mark bleeds, becomes tender, crusts repeatedly or does not resemble your other scars. A clinician can distinguish an established atrophic scar from active acne, infection or another skin change and can set realistic treatment goals.

Ask what caused the scar, whether active acne needs treatment first, and which procedure matches its depth and shape. Ask about expected recovery, skin-colour changes, the number of sessions likely to be needed and how to protect the area afterward.