According to the type of disease, drug rash is categorized into fixed drug rash, scarlet fever drug rash, purpura drug rash, etc., which can occur in different parts of the body, and the parts of the body where the drug rash occurs are related to its type. 1. Fixed-type drug rash: it mainly occurs in the oral cavity and genital and other skin and mucous membrane migratory parts, and some patients may also grow in the trunk and limbs and other parts of the body. 2. Scarlet fever type of drug rash: it mainly grows in the neck, gradually spreads to the trunk and limbs, and may eventually spread all over the body, in which the folds of the body and the flexion side of the limbs are more obvious. 3. Purpura-type drug rash: mainly occurs in both lower limbs, both sides are symmetrical, and when the condition is serious, it will also involve the trunk and limbs. In addition, acne-type rash is mainly on the face and chest and back, measles and eczema-type rash occurs all over the body, and exfoliative dermatitis-type rash is mainly on the face and hands and feet, etc. There are many types of drug rash. There are many types of drug rashes, it is recommended that the patient can go to the hospital to clarify the type of disease and follow the doctor’s instructions for treatment.