The increasing number of moles on the face may be caused by freckles, chloasma or melanocytic nevi. It is suggested that patients should clarify the specific cause of the disease under the guidance of doctors and treat it accordingly. 1. Freckle: Freckle is an autosomal dominant hereditary skin disease. Heredity and ultraviolet radiation are the main reasons for the worsening of this disease. 2. Chloasma: Chloasma is prevalent in middle-aged women. Melanin metabolism disorder, skin barrier damage and inflammation stimulation are the main pathogenesis of this disease. Sun exposure, heredity and hormone level disorder can cause aggravation of this disease. 3. Melanocytic nevus: Melanocytic nevus may be related to heredity, but sun exposure, trauma, hormone level disorders and other factors can increase the severity of the disease. For patients who have more and more moles on their faces, it is recommended to go to regular hospitals for examination and standardized treatment under the guidance of professional doctors.