Hi, It seems that you may be having intergluteal intertrigo. There may be itchy erythematous erosive lesions in the fold between the butocks. There may be some cause. Irritant like soap,perspiration,dust,detergents..etc might be responsible. The fungus like candida albicans may be there. Even some bacterial infections may exacerbate the lesion. You consult dermatologist for firm diagnosis and treatment. I usually advise in my patients having such problem in following ways.. - to avoid soap during bath. - to take Sitz bath in dettol containing water. -to keep the area dry. -to avoid excessive bathing. -to apply combined cream of antibiotic,steroids and antifungal. - to take short course of antibiotics and antifungal like ketoconazole. - to take antihistaminics like levocetirizine till itch is relieved. I hope you got my answer. Thanks. Dr. Ilyas Patel MD