Flat warts are caused by a viral infection, and it is safe to eat eggs, which are not contraindicated. Treatment should include antiviral medications and immune regulation to support symptomatic relief. Flat warts commonly occur in children and young women and are mostly found on the face and extremities. It is important to use sunscreen, maintain skin cleanliness, avoid scratching to prevent the spread of the virus, and disinfect clothes and surrounding objects. Oral medications such as pidotimod granules, thymosin enteric capsules, and spleen peptide lyophilized powder can be used, along with topical treatments like interferon gel and miquimod cream at the site of the lesions. Photodynamic therapy for the skin, which involves applying a photosensitizer weekly and using appropriate light sources for irradiation, is an additional treatment option, typically administered in three sessions per course. Pre-treatment methods such as scraping off the wart may be performed before photodynamic therapy. (The use of medications should be under the guidance of a physician.)