The reasons for more and more moles on the body include melanoma, age factors, endocrine disorders, ultraviolet factors and so on. 1. Melanoma: because of the abnormal proliferation of melanocytes triggered by many factors, melanoma metastasis can occur at this time, and therefore more and more moles appear. 2. Age factor: when the patient’s age increases, the melanin metabolism function decreases, at this time there will be a lot of black age spots on the body. 3. Endocrine disorders: endocrine disorders triggered by staying up all night will lead to an abnormal increase of melanin, and more and more moles will appear on the body. 4. Ultraviolet ray factor: when the human body often sunbathes in the sun, the irradiation of ultraviolet rays will trigger the increase of melanin production, and many moles will also appear. It is recommended to consult a doctor in time if there are more and more moles on the body, and to standardize the treatment under the doctor’s guidance after the cause of the disease is clarified.