Pseudoangiomatous mesenchymal hyperplasia may be caused by diseases such as bright red nevus, simple hemangioma, cavernous hemangioma and so on. According to different causes, you can choose physical therapy, medication and surgery as treatments. 1. Nevus erythematosus: There is no legal theory for the cause of nevus of bright red spot, and it is not ruled out that it is caused by the abnormality of the process of angiogenesis during the embryonic development of infants. It is suggested that patients should go to the hospital in time for laser treatment, freezing and other ways of treatment. 2. Simple hemangioma: Simple hemangioma is caused by congenital vascular malformation, vascular dysplasia, which may also be related to environmental factors or genetic factors. Most of the patients will gradually subside at the age of 3~5 years old and do not need special treatment. If the tumor does not subside for a long time and invades into important organs, it can be treated with carbon dioxide laser, X-ray irradiation and intra-tumor injection of corticosteroid suspension under the guidance of doctors. 3. Cavernous hemangioma: The cause of cavernous hemangioma is not clear, and most cavernous hemangiomas usually have family genetic history. Patients can be injected with sodium cod liver oil acid locally, but the dose of each injection should not be too large, or it will cause local necrosis. If the case is more serious, it is treated by surgical excision under the supervision of a doctor. Pseudoangiomatous mesenchymal hyperplasia can be caused by a variety of reasons, you should go to the local hospital in a timely manner, to clarify the cause of the disease before symptomatic treatment.