What to do about severe coccyx pain after a fall?

Rest, ice: Falls can cause severe pain, but more often than not, this pain is related to bruising. Less commonly, the coccyx can be broken (fracture), though treatment is similar. Avoid pressure on the area, ice as able, and allow your body to heal itself. Donut hole cushions can be helpful to allow sitting on hard surfaces.

Coccydynia.: This sounds like coccydynia, which is a pain in the tail bone which occurs after sitting on a hard surface for a long time or from falling onto your tail bone onto a hard surface. Can take a long time to heal up. You can try sitting on a "donut", that soft cushion with a hole in the middle that you find at the surgical supply stores. Anti inflammatories may help.