Often, lasers can get rid of flat warts. Flat warts are mainly caused by human papilloma virus infection. For patients with fewer warts, they can be removed after laser treatment. Commonly used are pulsed dye lasers and other lasers that utilize selective photothermolysis to destroy the warts through high temperatures, causing them to fall off, but pain may occur during treatment. After the laser treatment, you need to do a good job of daily protection to avoid wound infection. However, for patients with a large number of warts or those who are not suitable for physical therapy, it is recommended to use topical medications such as salicylic acid and interferon to exfoliate and inhibit viral replication. For those who have flat warts, it is recommended to go to a regular hospital and choose the appropriate treatment under the guidance of the doctor.