The difference between the skin flab and flat warts is the cause, clinical manifestations, treatment methods and so on. 1. Etiology: the cause of skin flab is not clear, may be related to obesity, diabetes, etc., flat warts are caused by human papillomavirus infection. 2. Clinical performance: (1) Happening parts: skin warts occur in the eyelids, neck, trunk or armpits. Flat warts occur on the forearms, back of the hands or face. (2) the occurrence of the crowd: the skin flab is most likely to occur in middle-aged and old people, flat warts in young people. (3) Symptoms: Neck warts are small, soft, pinhead-to-meter-sized pimples that are the same color as normal skin, and some of them are thin and tipped at the root. Flat warts are flat wart-like papules that are the size of a grain of rice to a soybean and have a hard texture. 3. Treatment: the skin flab is treated with carbon dioxide laser or excision. The patient with flat warts can use topical retinoic acid cream, benzalkonium bromide solution, electrocautery method, liquid nitrogen freezing and other methods of treatment. The skin or flat warts patients should go to the hospital in time, under the guidance of the doctor standardized treatment.