Conversation: The conversation between human and AI assistant.
[|Human|] A few days ago, I noticed that my tailbone was starting to hurt, which was weird because I havent fallen or hurt it at all. Today I noticed in addition to the tailbone pain, there is also a painful bump on my left butt cheek. It hurts to sit as well.
[|AI|]  Hello and welcome to Chat Doctor, Tail bone pain can be due to musculoskeletal pathology. Stress or strain in the muscles of the back can cause such localized pain. A CT or MRI of the backbone is required to look for any lesion of the bone or the surrounding muscles. A painful bump on the buttock is commonly due to folliculitis or fur uncle (boil). However, a clinical examination is required to know the exact nature of the lesion. Management can be planned after clinical examination. Thanks and take care Chat Doctor.