No one's ever been able to answer this for me. I think I bruised mine. I gave birth standing and have had trouble sitting since the birth. 10 months later I'm still pretty uncomfortable. Haven't tried chiropracic, but my physiotherapist suggested butt squeezes and I do notice that squeezing one side hurts more than the other. It has gotten better, but not 100% yet. What does the chiropractor do to help this?