Pigmented purpura dermatitis, also known as pigmented purpura dermatosis, is a chronic skin disease characterized by immune-mediated, red blood cell extravasation. It can be treated by topical therapy, systemic therapy and physiotherapy. 1. Topical treatment: If the symptoms of patients with pigmented purpura dermatosis are relatively mild, they can usually be treated with topical treatment. In the course of treatment, some glucocorticoid preparations can be applied locally, which have the effect of anti-inflammatory and anti-itching, and can relieve the redness, swelling, itching and other symptoms caused by the disease to a certain extent. 2. systemic treatment: if the pigmented purpura skin disease patients with more serious symptoms, but also under the guidance of the attending physician, oral vitamin C, compound rutin and other drugs to reduce the permeability of blood vessels; itching is obvious, can be taken orally antihistamines such as loratadine; lesions are extensive, the condition of the serious, need to comply with the doctor’s instructions for oral glucocorticoid drug therapy. 3. Physical therapy: pigmented purpura skin disease patients in the use of drug therapy at the same time, can also be combined with photochemical therapy, usually applied to the complementary lipids – long-wave ultraviolet irradiation therapy, there is a significant therapeutic effect; narrow-spectrum ultraviolet irradiation therapy also has a certain therapeutic effect on the disease. If pigmented purpura skin disease is diagnosed, it is recommended that patients go to the hospital for examination as early as possible and standardize the treatment under the guidance of the doctor in order to minimize the serious adverse consequences of the disease.