Acne scarring usually causes cosmetic and psychological problems. Our aim of the study was to compare the efficacy of microneedling alone, intradermal injection of platelet rich plasma (PRP) alone and combined microneedling with PRP in the treatment of atrophic post‐acne scars. Thirty adult patients with facial post‐acne scars were randomly recruited and divided into two groups: A and B. Group A: included 15 patients; the left sides of their faces were treated with microneedling by dermapen followed by PRP while on the right side of the faces microneedling alone was performed. Group B: included 15 patients; the left sides of their faces were treated with microneedling by dermapen followed by PRP while the right sides of the faces were treated with intradermal injection of PRP. For both groups, the treatment session was repeated every 3 weeks until clearance of the atrophic acne scars or for four sessions …