The increasing number of dark spots on the Bichon Frize may be caused by melanin deposition, damaged hair follicles, or skin diseases. First, check whether the dog has parasites and skin itching. If not, then it is melanin deposition. , you only need to pay attention to the dog's hygiene, and it will not affect the dog's health; if it is caused by skin disease or damaged hair follicles, you need to help the dog with external deworming, and do not shave the dog excessively. Reduce UV exposure.