The use of retinoic acid ointment is for topical application, take the appropriate amount of the drug on the affected area can be, the specific use should consult a professional doctor. Before using Vitamin A ointment, the affected area should be washed with warm water and dried before applying the drug, usually used before bedtime, the appropriate amount of ointment gently applied to the affected area can be. Vitamin A ointment is a vitamin A derivative, clinically used for the adjuvant treatment of flat warts, furuncle, acne vulgaris, mucous membrane leukoplakia, psoriasis, follicular keratosis. It should be noted that the use of retinoic acid ointment is prohibited for those who are allergic to any of the components of this drug, women in the first three months of pregnancy, and nursing mothers, and the drug should not be used in the eyes, skin folds, rosacea, eczema, sunburn, acute and subacute dermatitis patients should not use this drug, and should be avoided in the process of treatment of sun exposure. Some patients may experience burning sensation, erythema, flaking and other skin irritation symptoms after using the drug, most patients can adapt to and tolerate on their own, if the discomfort persists or aggravates, they should seek medical advice to adjust the use of the drug in a timely manner. Patients should follow the doctor’s instructions to use retinoic acid ointment, avoid blindly use the drug, so as not to affect the condition, or side effects.