Hello, Welcome to HCM, To confirm the diagnosis you requires physical examination, so you have to subject yourself for physical examination from your doctor. Folliculitis is a group of skin conditions in which there are inflamed hair follicles which result in a tender red spot. It may be superficial or deep and it can affect anywhere there are hairs including buttocks. It is mainly due to infection, blockage,irritation and various skin diseases. It is confirmed by cytology and culture. It is best treated with topical antibacterial clindamycin lotion and oral antibiotics like cephalexin. Thank you.