5-Fluorouracil ointment is mainly used to treat acromegaly and is indicated for hyperkeratosis, warty damage and white patches. The main ingredient of 5-fluorouracil ointment is fluorouracil, this drug is mainly for the treatment of condyloma acuminatum, for hyperkeratosis, warty damages and white patches, this drug will be converted into 5-fluoro-2-deoxyuridine nucleotide first in the body, which is able to inhibit thymine nucleotide synthase and inhibits DNA biosynthesis. 5-Fluorouracil ointment may cause some adverse reactions, such as nausea, loss of appetite, vomiting, rarely cough, cerebellar ataxia, and occasionally inflammation or ulceration of the oral mucosa. It is contraindicated in women during the first trimester of pregnancy, breastfeeding, cannot be used if you have chickenpox or herpes zoster virus, and is also not recommended for use in debilitated patients. It is recommended to use the medication under the guidance of a doctor, not blindly self-medication to avoid adverse effects.