The reasons for the increasing number of moles on the face include genes, ultraviolet radiation, trauma, and immunosuppression.
1. Genes: melanocytes in nevi are mostly congenital, due to the black cells staying in the dermis while moving during embryonic development.
2. Ultraviolet radiation: If the face is exposed to ultraviolet radiation, it may promote the synthesis of melanin, thus inducing the appearance of nevi.
3. Trauma: If the face suffers from trauma and the wound is not properly cared for after healing, the affected area may develop hyperpigmentation, thus inducing nevus.
4. Immunosuppression: if the body’s immunosuppression function is impaired, it may cause the body’s immunity to decline, leading to the appearance of moles on the body surface easily.
There are many reasons for the increasing number of moles on the face, so patients are advised to consult a doctor for examination and clarification of the causes.