Long black spots on the body like a mole may be pigmented nevus, melanoma and other factors lead to, need to clarify the cause and then targeted treatment, common removal of treatment modalities such as laser treatment, surgical treatment. 1. pigmented nevus: commonly known as “nevus”, is due to benign tumors of the skin, almost everyone has, can occur in any part of the human body, manifested as black, brown pigmented spots or papules, generally slow-growing, the probability of malignant transformation is very low, generally do not need special treatment, self-consciousness affects the aesthetics of the time can be through the laser treatment or surgical treatment. It can be removed by laser treatment or surgery when it affects the aesthetics. 2. Melanoma: it is a kind of disease caused by excessive proliferation or malignant proliferation of melanocytes, with high degree of malignancy. Early stage of the disease usually has no conscious symptoms and only manifests as black spots or slightly elevated black papules, and the skin lesions will gradually expand, and there will be symptoms such as vesicles and ulcers, and surgical excision is the first choice of its treatment program. Black spots on the body like moles may also be due to other factors, it is recommended that patients seek medical attention in a timely manner to clarify the cause of the disease, and then choose the best treatment.