A pimple on the buttocks may be caused by folliculitis, boils, eczema, etc. It may be related to skin infections, local environment and dietary factors. 1. Skin infections: boils are mostly caused by invasive infections of pathogens such as Staphylococcus aureus, Streptococcus, Staphylococcus epidermidis, and Pseudomonas spp. Folliculitis is also mostly caused by pathogens such as Staphylococcus aureus and other pathogens, which can cause pimples on the buttocks. 2. Local environment: local high temperature, or do not pay attention to personal hygiene and cleanliness, not timely change and wash underwear, is also easy to cause the emergence of folliculitis, boils, etc.; long-term local skin in a moist, sweaty environment, easier to cause eczema, can also lead to buttocks acne. 3. Dietary factors: long-term drinking, eating greasy, or consuming too much spicy and stimulating food, will promote the sebaceous glands in the skin area to increase secretion, oil accumulation in the hair follicles, discharge is not smooth, it will also be easy to cause folliculitis and other diseases, resulting in buttocks pimples on the manifestation. It is recommended that patients strengthen personal hygiene, keep the skin clean and dry, if necessary, go to the hospital, clarify the cause, and follow the doctor’s instructions for treatment.