If you have a lot of small pouches on your buttocks, if they are the size of rice grains, accompanied by itching and discomfort, consider that it may be prickly heat or eczema due to sedentary hot sweat impregnation. If the skin is dry and clean, avoid dampness and sweating, you can use topical fisetin and glycolite lotion 2-3 times a day; take a shower when the skin is sweaty to avoid sweat impregnation, if it is a small bag the size of a soybean grain with painful discomfort, consider that it may be due to bacterial infection resulting in folliculitis or boils. You can apply topical fusidic acid cream and mupirocin cream twice a day for anti-infection treatment.