Salicylic Acid Ointment is available in 2% and 5% sizes, different sizes of Salicylic Acid Ointment can be used to treat different skin disorders.Generally, an appropriate amount of this product is applied to the affected area twice a day. Salicylic acid 1%-3% concentration has keratinization contributing and anti-itching effect, 5%-10% has keratolytic effect. The common salicylic acid ointment in the clinic has two specifications: 2% salicylic acid ointment is commonly used in the treatment of acne and other diseases; 5% salicylic acid ointment is commonly used in the treatment of psoriasis and corns with localized keratosis. Salicylic acid ointment can be applied directly to the affected area twice a day, but it should not be used on a large area, as it may lead to dizziness, confusion, nervous disorders, persistent tinnitus, and other symptoms of salicylic acid systemic toxicity; this drug will be absorbed into the skin, so it should not be used for a long period of time. In addition, it is forbidden for those who are allergic to this drug, and should not be used when the skin is broken or infected; avoid contact with eyes and other mucous membranes during use; if burning sensation, redness and swelling occur after use, the drug should be discontinued, and the topical medication should be washed off, and the doctor should be consulted promptly. In the use of salicylic acid ointment should pay attention to the specifications and use, need to be used under the guidance of a doctor, so as not to lead to adverse consequences.