Q. I get a sharp pain in my tailbone if I sit even for 30 minutes. What is the reason?

Hello doctor,

I am a 25 year old female, and I weigh 175 lbs and 5.7 feet tall. I have noticed for the past few months, that sitting is becoming increasingly uncomfortable. I get a sharp pain in my tailbone if I sit for even 30 minutes to an hour. The pain when I straighten up again can cause me to double over when it is at its worst. I went to the movies this week, and it was almost unbearable to sit through, which seems odd for someone my age. I am fairly active, although I do have a part-time job that somewhat frequently requires sitting for a few hours. I have been told that the bones in my back are a bit smaller than normal due to my long torso, but I am otherwise healthy. When I was 13 or 14, I fell off the back of a dirtbike directly onto the pavement, and I landed on my tailbone area. I never went to the doctor about it. Is it possible that an injury like that from so long ago could be causing me problems now? Other than that occasion, I have had no recent trauma to that area. Either way, whether the old injury is bothering me or it is coming just from added sitting at my job, is there anything I can do to relieve this pain?