Nevus is a kind of alias of pigment mole, the nevus on the face grows bigger and bigger including physiological and pathological factors. 1. Physiological factors: with the growth of age, the nevus on the face of some patients can be proportional to the growth of physiological phenomena, generally do not need to carry out special intervention, and will not affect the physical health. 2. pathologic factors: consider the existence of local infection and cause, especially bacteria or fungal infection local nevus, can lead to local capillary expansion, and cause nevus hyperplasia; In addition, nevus is in the friction more a part, and long-term friction as well as stimulation, can also lead to the growth of nevus; In addition, some patients’ nevus not only increase in a short time, but also appear dark color, pain, ulceration and other phenomena, can also be considered as cancerous and caused. So the nevus on the face grows bigger and bigger, and accompanied by other uncomfortable symptoms, you need to go to the hospital in time, active treatment, so as not to miss the condition.