Dampness in the buttock groove is usually not AIDS, but may exist in diseases such as perianal eczema, hemorrhoids or anal fistula. It is possible that this condition is due to heavy dampness in the body, combined with sedentary work reasons and poorly ventilated and breathable clothing, resulting in frequent dampness in the area. The buttock groove itself has more folds and is prone to sweating, which may cause perianal eczema, a common allergic inflammatory skin disease, usually combined with fungal infections, patients need to go to the hospital for examination and diagnosis. In addition, perianal diseases such as hemorrhoids and anal fistulas can also cause dampness in the area due to increased exudate. In contrast, AIDS is a systemic disease caused by HIV infection. Patients may have fever, swollen lymph nodes all over the body, cough, chest pain, difficulty in breathing, diarrhea, dizziness and headache, skin and mucous membrane damage, tumors and other manifestations, so moist hip grooves are generally not symptoms of AIDS. To avoid this, patients should avoid sitting for a long time on a daily basis, wear loose and breathable clothes, and keep the skin around the buttocks dry and clean. If the condition is not relieved, patients can consult the anorectal department of the hospital for appropriate examination and treatment.