1. Generally speaking, flat warts are mainly due to human papilloma virus infection, and other viral infections, the infection state and the body’s immune state related to, when the patient’s immunity is strong, the warts may subside on their own, to achieve the purpose of the cure. When the body immunity is weak, the warts may persist and even gradually increase. 2. medication: for flat warts, patients can use salicylic acid ointment, through the promotion of epidermal exfoliation to play a therapeutic role. At the same time, you can also choose interferon gel, which belongs to the broad-spectrum antiviral agent, with the inhibition of viral replication, enhance the role of cellular immunity. 3. Physical therapy: flat warts can be removed with physical therapy methods, such as cryotherapy, which can use liquid nitrogen to produce low temperature, so that the skin lesions necrosis off. You can also choose the laser treatment, through the high temperature to make the skin tissue necrosis off. Flat warts have a certain chance of self-healing. It is recommended that the patient early standardized treatment, in order to reduce the adverse effects of the disease.