Moles on the face grow bigger and bigger, the reasons usually include physiological factors, external stimuli and cancer, etc., once found need to consult a doctor in time for treatment. 1. Physiological factors: Moles on the face can grow with the growth of the body, which is mostly a normal phenomenon, and generally do not need special treatment. 2. External stimulation: the growing of moles on the face may also be caused by external stimulation, such as friction, sunlight stimulation and gradually become bigger and darker, if the pigmented moles are not big, usually there is no need for treatment. 3. Cancer: The bigger and bigger moles on the face may also be caused by malignant changes. If the mole area increases, the border is unclear, and accompanied by pain and other symptoms, you need to go to the hospital in time to do histopathological examination, and choose the appropriate treatment according to the results. If a mole grows bigger and bigger on your face, you need to actively consult a doctor and follow the doctor’s instructions for reasonable treatment.