Red nevus on the body is usually cherry-like hemangioma, which may be caused by congenital developmental abnormality, abnormal estrogen level, skin aging and other reasons. 1. Congenital developmental abnormality: due to the interference of harmful factors during embryonic period, resulting in abnormal development of blood vessel wall, red nevus may appear after birth. 2. Abnormal estrogen level: Due to the dysfunction of the endocrine system, the estrogen level secreted is abnormally high, which may cause blood vessel proliferation, and thus the phenomenon of red nevus may appear on the body. 3. Skin aging: long red nevus is common in the elderly, also called cherry-like hemangioma, which is a manifestation of skin aging. It is a manifestation of skin aging. Generally, the course of the disease develops slowly and the number may increase. Red nevus on the body usually has no conscious symptoms and does not need special treatment. However, if you have cosmetic needs, you can go to a regular hospital to remove it by laser, freezing, etc., and follow the doctor’s instructions for specific treatment measures.