Welcome to HealthcareMagic. The pain in tail bone can be due to coccydynia
but the blood from a hole in the tail bone is due to a pilonidal cyst
. It is a cyst right over the coccyx
area. In this the skin becomes reddened or even sometimes discharges pus and blood. When it is infected, it causes pain. Antibiotics or surgical drainage
may be required.
Please consult a surgeon and get it seen.
Hope it helps you. Regards.