Malignant melanoma is common in white people. Queen S-Land in Australia is a well-known high-incidence area of malignant melanoma in the world. The incidence of malignant melanoma in my country is not high, but due to the lack of awareness of its severity by doctors and patients, it is usually too late when seeking medical treatment, and the treatment effect is extremely unsatisfactory. This disease is common in people aged 30 to 60 years old. Spity, a rare juvenile malignant melanoma, reported 13 cases, aged 1.5 to 12 years old. Younger people generally have a lower degree of malignancy and a better prognosis after surgical resection. There is almost no difference in the gender of the onset of the disease, but the location of the lesion is related to gender. Those who occur on the trunk are more common in men, and those who occur on the limbs are more common in women than men, especially facial freckle melanoma, which is more common in elderly women.