How long does it take for a bruised sacrum to heal?
about 4 weeks
A tailbone injury can be very painful and slow to heal. Healing time for an injured tailbone depends on the severity of the injury. If you have a fracture, healing can take between 8 to 12 weeks. If your tailbone injury is a bruise, healing takes about 4 weeks.
Don't know how accurate that is. But, that's what google says.