NSAIDs can be categorized into common types such as salicylic acid, aniline, aryl alkanoic acid, xikang and others according to their chemical structure. 1. Salicylic acid: common salicylic acid non-steroidal anti-inflammatory drugs, including aspirin, bisabolol salicylic acid, p-aminosalicylic acid, etc., of which aspirin is the progenitor of the non-steroidal anti-inflammatory drugs, anti-inflammatory, analgesic, antipyretic and inhibit platelet aggregation effect. 2. Aniline: Aniline NSAIDs include acetaminophen, nimesulide, finasteride, etc. These drugs have relatively strong analgesic effects. 3. Arylalkanoids: common drugs are indomethacin, diclofenac and so on. 4. Xikang and other classes: common drugs are meloxicam, celecoxib, parecoxib, pau d’arco and so on. There are other ways to categorize NSAIDs, so it is recommended that patients go to the relevant departments of regular hospitals for detailed consultation and follow the doctor’s instructions for medication.