Abstract: Objective: To assess the efficacy and safety of Q-Switched 1064 nm Nd:YAG laser in the treatment of moderate acne vulgaris. Methods: Thirty patients with moderate acne vulgaris were treated with Q-Switched 1064 nm Nd:YAG laser, firstly 4mm spots, 4.0-6.0 J/cm², and then, cleaned the comedos or/and pustules with sterile injection syringe followed by Q-Switched 1064 nm Nd:YAG laser for 6/8mm spots, 2.0-3.5 J/cm², once two weeks for 3 times. Results: Of 30 patients, 20 patients (66.67%) were remarkably improved, 9 (30%) were moderately improved and one (3.33%) was ineffect. The clearance rates of papules, pimples, pustules, and erythema were 69.70%, 54.87%, 93.25% and 26.37%, respectively. Conclusion: Q-Switched  1064nm Nd:YAG laser is effective and safe in the treatment of acne vulgaris.

Key words: acne vulgaris, Q-Switched Nd：YAG 1064 nm laser