The CO2 laser has been used in plastic surgery and dermatology for a long time and is more common. Common skin problems can be treated with CO2 laser to achieve more satisfactory results. In China, the laser has been used extensively to treat: (1) benign skin masses: pigmented nevi, seborrheic keratoses, dermatoglyphs, sebaceous granulomas, sebaceous cysts, mucous cysts, hair epitheliomas, fibromas, keratotic echinoderma, sebaceous nevi, verrucous nevi, scabies nodules, nodular itch; (2) viral skin diseases: flat warts, common warts, plantar warts, infectious molluscum contagiosum, condyloma acuminata; (3) vascular skin diseases: spider nevi, spider nevi, condyloma acuminata. (3) Vascular skin diseases: spider nevus, hemangioma, hemangioblastoma, angiokeratoma; (4) Early tumors: carcinoma in situ (Bowen), early squamous cell carcinoma, early basal cell carcinoma, wart carcinoma.