Ketoconazole lotion is mainly used for the treatment and control of dandruff and its related disorders of flaking, scaling and itching, as well as seborrheic dermatitis. Patients should apply the appropriate amount of lotion to wet hair, rub gently to make a large amount of foam, massage gently for 3-5 minutes and then rinse off with water. If the patient’s condition is more serious, this method can be repeated once. Some patients using ketoconazole lotion will have skin burning sensation, itching, irritation, greasy and other adverse reactions, after discontinuing use can generally return to normal. It should be noted that patients who are allergic to the components of this drug are prohibited from using ketoconazole lotion to avoid allergic reactions such as respiratory difficulties and generalized rashes. In addition, patients with scalp damage should not use ketoconazole lotion to avoid irritation of the wound. When patients use ketoconazole lotion in the clinic, they should follow the doctor’s instructions. If discomfort occurs, it should be discontinued immediately and seek medical attention.