Moles in general will grow bigger and bigger. 1. Moles, a kind of benign tumor located on the surface of human body, can grow gradually with age under normal circumstances, but the growth rate is extremely slow and even in a long-term stable state. 2. When a mole is affected by some external factors, it may lead to faster growth, such as excessive friction, extrusion, and prolonged exposure to ultraviolet rays. 3. Since nevus has a certain tendency of malignant transformation, when a stable pigmented nevus suddenly grows rapidly and its shape changes abnormally, one must be careful whether there is a possibility of malignant transformation, in which case one must go to the hospital in time for medical consultation, and undergo surgical excision treatment in time if necessary. It is suggested that patients should pay attention to the growth rate of nevus and go to the hospital in time if any abnormality occurs.