Therapeutic effect of Nd:YAG 532 nm picosecond laser on freckles
Objective To study the effect and safety of 532 nm picosecond laser in the treatment of freckles.Methods From November 2021 to March 2023,104 patients with facial freckles were recruited in this retrospective clinical study.According to age and skin Fitzpatrick classification,it was divided into group A(21 to 30 years old),group B(31 to 40 years old),group C(41 to 50 years old),and group D(51 to 60 years old).All patients were grouped by age and Fitzpatrick skin classification and treated with a 532 nm picosecond laser once.All patients were assessed for clinical efficacy,and adverse reactions after 1 to 3 months.Results After one treatment,the overall effective rate was 94.23%,the cure rate was 45.19%,and there was no obvious correlation with between age and Fitzpatrick skin classification.The post-inflammatory hyperpigmentation occurred in 6 patients.Temporary hyperpigmentation alleviated 3 to 6 months after the treatment.Conclusion The 532 nm picosecond laser is a safe and effective modality for removing freckles without scarring or perma-nent pigmentary changes.
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