The cause of sudden growth of coffee spots in adults is still unclear and is related to heredity. Generally, no treatment is needed, and those with aesthetic needs can choose physical therapy to remove them. Its color is light brown, brown to dark brown, not affected by sun exposure, and can occur in any part of the skin. Some normal people can be present at birth, or gradually appear later in life. If the patient’s immediate family members have coffee spots, the probability of the patient’s disease will also increase. The treatment can be carried out by laser, which can penetrate the skin, act directly on the pigment in the skin, and use the energy it produces to make the pigment dissipate, so as to achieve the purpose of removing coffee spots. Liquid nitrogen can also be used to freeze the surface of coffee spots, so that the local tissues are frozen instantly and the epidermal pigment cells are necrotic, so as to achieve the purpose of removing the spots. In addition, it is suggested that patients should go to the hospital in time and follow the doctor’s instruction to avoid delaying the condition.