Curing pigmented purpura dermatitis may take from one month to one year, depending on the severity of the patient’s condition. 1. The specific etiology of pigmented purpura dermatitis is not clear, but it may be caused by cell-mediated immune response, immune complex function and Langerhans cell function, or factors such as long-term exposure to fuels, wearing of chemical fiber clothing, venous hypertension, ingestion of chemicals, long-term smoking and drinking, and long-term use of aspirin. Symptoms such as asymmetric purpura, purplish hemorrhagic spots, scaly erythema, and ulcers may occur. 2. In general, if the pigmented purpura dermatitis patient’s condition is mild and the scope of the rash is very small, you can take glucocorticosteroids, vitamins, calcium and other drugs, while using anti-itching medication for treatment, which can effectively control the condition and alleviate the uncomfortable symptoms. Treatment for about a month, there may be obvious results. 3. However, if the condition of pigmented purpura dermatitis is serious, with rashes all over the body and other complications, then in addition to actively treating the original disease, further symptomatic treatment is also needed. Due to individual differences, the recovery time of each person is different, some need one or two months, some need about half a year or even a year. It is recommended that the pigmented purpura dermatitis timely to the hospital, follow the doctor’s instructions standardized medication, so as not to delay the condition.