Pain on Only One Sit Bone? Common? | Bike Fit Viewer question

There is asymmetry in the Spine that has been there for a long time more than likely from the day you were born. Upcspine.com, NUCCA.org, Thespesific.com or Upper cervical health centers.  Don't be measured by them the day of a hit to the head accident of some kind or fall. Wait 4 - 5 days. If you can be treated by Steven Duff, Windsor, California or Richard Duff, San Francisco, California. Take it easy when you are adjusted. Let the body get used to being balanced. Get a chiropractic pillow that lets  the back of your head rest on the same level as the mattress conforming to the curve of your neck.