How do you make your butt stop hurting after you fell on it?

I fell down a waxed flight of wooden steps several years ago. Instantly, I was in a lot of pain. I consulted with my Doctor Who informed me that I had bruised my tailbone. It took almost a year for the pain to go away. Heat relieved some of the pain, however, it hurt to sit, lie flat and run. I would recommend seeing a doctor, as you may have broken your tailbone or have some other injury. If not, it may take some time for the injury to heal.