Not sure exactly: what it is without knowing how you hit or any other history, but you may have bruised your coccyx or caused some mal-alignment of the sacrum and coccyx. It should continue to get better. Try avoiding sitting on backside (use donut, sit on side, etc) for the next 2 weeks, ice occasionally, should get better. If not, see a physician to examine.
Answered 7/22/2014
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A doctor has provided 1 answer
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