Flat warts can be recognized by their shape, color, location and symptoms. 1. Shape: In most cases, they are flat, rice or soybean-sized round or oval papules with a smooth surface and hard texture that are higher than normal skin. 2. Color: usually appear as light brown or close to the normal skin color of the papules. 3. Occurrence: It often occurs on the face, the back of the hands and forearms and other parts. 4. Symptoms: Most patients have no conscious symptoms, but a very small number of patients may experience mild itching, localized redness and other uncomfortable symptoms. In addition to the above methods, it can also be recognized by whether there are pimples distributed along the scratch marks in the form of stripes or beads, or whether a large number of pimples suddenly appear in a dense manner, etc. When uncomfortable symptoms appear, it is recommended that the patient be promptly informed of the symptoms. When symptoms appear, it is recommended to go to the hospital in time for examination and identification, and early targeted treatment.