Acne affects millions, usually mild and treatable with OTC products. However, severe cases need professional care. See a dermatologist if you have: Cysts or nodules: large, painful, deep bumps that risk scarring and need prescription treatment. Late-onset acne: acne developing in adults with no prior history, possibly signaling hormonal or health issues. Persistent acne: acne continuing from adolescence into adulthood, requiring long-term management. A dermatologist can diagnose severity, identify underlying causes, and recommend effective treatments to prevent scarring and complications. If you have severe or unusual acne, don’t wait—consult a dermatologist for clear, healthy skin