To determine whether you have fatty grains or flat warts, you can identify them by their size, color, and area of prevalence. Cellulite is mainly related to factors such as genetics and damaged sweat ducts. Flat warts are mainly a skin disease caused by human papilloma virus infection. 1. Volume: The volume of fat grain is usually 1~2 millimeters in diameter of small papules, and will not be fused with each other. The size of flat warts varies, usually from rice grain to soybean size, most of them appear suddenly, the number of more and dense, can be fused with each other into a piece. 2. Color: The color of the skin lesions is yellowish white, while the color of flat warts is usually light brown or normal skin color. 3. The location of the warts: they are found on the face, especially on the cheeks, forehead, and eyelids. The flat warts are found on the face, back of the hands and forearms. If you can’t tell, it is recommended that you go to the dermatology department of a regular hospital to be identified by a professional doctor, and the seriousness of the symptoms can be treated accordingly.