The proper use of salicylic acid ointment is topical 1 to 3 times/day depending on the disease such as tinea capitis, tinea pedis, and localized keratosis phenomena, which can be paired with topical sealing treatments. Because salicylic acid can play the role of local exfoliation, there are irritating ingredients, especially for the more sensitive patients, before using salicylic acid ointment, you should first conduct an allergy test behind the ear, if there is localized redness and swelling, you should avoid the use of salicylic acid ointment, if the salicylic acid ointment is not allergic to, then you can continue to use. The use of salicylic acid ointment, you should first clean the local skin, and then extract the appropriate amount of cream applied to the affected area, according to the condition of the use of 1 ~ 3 times / day, can improve the symptoms of local keratosis pilaris, need to strictly comply with the doctor’s instructions to apply, to avoid adverse effects. Salicylic acid ointment may cause irritation or contact dermatitis symptoms during use, and after extensive use, salicylic acid systemic toxicity manifestations, such as dizziness, confusion, shortness of breath, tinnitus, dizziness and headache, may occur. It is contraindicated for those who are allergic to any of the components of the drug. It is recommended to follow the doctor’s instructions for the treatment of the above conditions, the dose of the drug should be strictly controlled, not blindly use the drug.