Uncertainty exists in the removal of warts by Fluorouracil for a few days, which is determined by the number of warts, their size and so on. Fluorouracil is available in both topical ointment and injectable forms, the injectable form is used in the treatment of malignant tumors and other treatments, and the topical preparation is an ointment used for common warts of the skin, flat warts, foot warts and so on. There may be adverse reactions such as nausea, stomach pain, irritation of itchy skin, and hyperpigmentation after topical use. Fluorouracil ointment can be used as a treatment for removing warts by blocking the blood vessels in the warts, disrupting the blood supply, and destroying the viral reproduction, which ultimately results in the warts falling off. It may take a longer period of time and multiple treatments to get rid of warts that are very small in size, and may not be able to achieve the goal of treatment for a large number of warts that are large in size, etc. If warts are present, it is best to use laser or electrocautery to remove them cleanly in a single session, taking care to protect the wound from infection after the procedure. Fluorouracil to remove warts, need to be used under the guidance of a doctor, it is recommended to consult a doctor.