Bone sticks out on right side of butt/sacrum. Twisted pelvis?

[JonnyD]

Yes, that might be a possibility. So with the pelvis you have the two bones as you describe, on either side of the crevasse of your butt. However, the tailbone falls down between these. So if it fractured and healed at an angle, you may be perceiving the pelvis to be at an odd angle, when it may be the tailbone.

Until someone in the know can palpate, or you get an X-ray, it's difficult to know for sure.

I am finding it difficult to find a name or image for this bone that's sticking out but I think it may be the right-Cornua (See Image) which is located on top of the coccyx/tailbone?

I have a few more questions if you don't mind. What I am most concerned about is how this will affect me as I age. As I already mentioned the muscle on the right side around the pelvis and hip is lacking compared to the other side - how do I decipher whether this is from under use or because it is wasting away due to inflammation? and will it get worse? It gets tender in that area pretty quickly - is tenderness a sign of inflammation?

Thanks, I plan on making an appointment with a physiotherapist soon.