How to Treat Flat Warts

Flat warts are a viral infection caused by the human papillomavirus (HPV). This condition predominantly affects adolescents and commonly occurs on the face and dorsum of the hands. It is contagious and can spread via direct or indirect contact. Flat warts typically appear as oval or polygonal, flat-topped papules. So, how should flat warts be managed?

Management of Flat Warts

Local therapy is generally recommended for flat warts, such as topical application of fluorouracil ointment or 3% tretinoin (tretinoin butyl ester) solution. However, patients should not self-administer these agents; treatment must be conducted under medical supervision. Improper use may lead to adverse effects including hyperpigmentation, skin erosion, edema, and allergic reactions. Under physician guidance, tretinoin cream may also be used—caution should be exercised due to its potential for irritation, though consistent application yields noticeable therapeutic benefits. Systemic treatments—including transfer factor, polyinosinic-polycytidylic acid (poly I:C) injections, and thymosin injections—may also be considered.

Flat warts are typically caused by HPV infection. They often appear suddenly as flat-topped papules ranging in size from pinhead to millet grain, with round or irregular shapes. Slightly elevated above the skin surface—or sometimes more prominently raised into dome-shaped lesions—they feature smooth surfaces, well-defined borders, firm consistency upon palpation, and colors varying from light brown or gray to yellowish or normal skin tone. Lesions are usually scattered or clustered; some may coalesce or align linearly along scratch marks (Koebner phenomenon).

Patients are advised to adopt healthy lifestyle habits, maintain a balanced diet, avoid spicy and irritating foods, and take prescribed medications strictly under physician supervision. We hope this information proves helpful to you.