Fleshballs on the buttocks may be caused by boils, sebaceous cysts, lipomas and other reasons. 1. Boil: It is mainly due to the infection of the skin by Staphylococcus aureus, which can lead to the symptom of small hard texture meatballs appearing on the local skin. Boils can occur on the buttocks, causing the growth of meatballs on the buttocks. 2. Sebaceous cysts: mainly due to the blockage of sebaceous glands, resulting in a large accumulation of sebum, leading to the appearance of meatball-like cysts on the skin, which can appear on the buttocks. 3. Lipoma: it is a kind of benign tumor mainly caused by the abnormal accumulation of adipose tissue, which can lead to the appearance of meatball-like lumps on the local skin. When lipoma appears in the buttocks, it can cause the manifestation of long meatballs on the buttocks. It is recommended to go to the regular hospital for relevant examination in time to clarify the cause and then actively carry out treatment after the appearance of long meatballs on the buttocks.