Résumé
Objective To investigate the narrow spectrum red blue light combined with benzoyl peroxide gel for the treatment of acne vulgaris and their side effects.Methods A randomized comparative clinical trial was employed.One hundred and forty-eight patients were divided into the two groups by simple random method,the observation group,2 times per week to narrow spectrum red blue light treatment of 12 times in a row,topical benzoyl peroxide gel at the same time,the control group only six weeks,topical benzoyl peroxide gel evaluate efficacy and safety.Results Two groups of efficient light acne vulgaris patients were 91.11％ and 69.77％ respectively,with statistically significant difference (x2 =6.81,P ＜0.05);Patients with moderately severe acne vulgaris effectiveness were 86.67％ and 58.62％ respectively,efficient comparison between groups,with statistically significant difference (x2 =7.23,P ＜0.05).The observation group's efficience was higher than the control group's.Conclusion Narrow spectrum red blue light combined with benzoyl peroxide gel is an effective modality for treating acne vulgaris with rapid acting and few adverse effects.