<s>[INST] I was told a few years ago by my chiropractor that I had two tailbones. He told me it wasn t very common. I sometimes (randomly) will have severe lower back pain to where it hurts to stand up straight. But I can t seem to find ANY information about having two tail bones, is this even possible? [/INST] Welcome to Chat Doctor I have gone through your query and understand your concern. I have never seen in my clinical practice two tail bones and also never read about two tail bones. You can get your x of sacrococcygeal joint to confirm this. You can discuss with your doctor about it. Hope your query get answered. If you have any clarification then don't hesitate to write to us. I will be happy to help you. Wishing you a good health. Take care. </s>