Moles on children may be caused by heredity, ultraviolet radiation and other reasons. 1. Heredity: Moles on children’s bodies may have a certain relationship with genes or heredity, if one or both parents have a lot of moles, there is a certain possibility that it will cause moles on children’s bodies. 2. Ultraviolet radiation: prolonged exposure to ultraviolet radiation can also lead to moles on children, generally due to sun exposure to ultraviolet light, resulting in the proliferation of melanocytes in the skin, the secretion of melanin particles increased, there may be an increase in the mole performance. Children can go to the hospital to see a doctor, under the guidance of the doctor’s instructions for standardized treatment.