Small red blood blisters on the body, if the patient is elderly, accompanied by a pronounced itching sensation, a rash on the mucous membrane of the mouth, blisters that expand when pressed, and blood blisters that easily appear when the normal skin is rubbed, are considered to have a high probability of aspergillosis. Pemphigus is an autoimmune herpetic disease, which is caused by the presence of antibodies in the body, and it is recommended to seek medical attention in a timely manner, as it can be life-threatening in severe cases. The main treatment is glucocorticosteroids, and the dosage is usually chosen according to the severity of the lesions. Since glucocorticosteroids have side effects, it is best to be hospitalized. During treatment, routine blood tests, blood ions, liver and kidney functions, etc. should be monitored.