These injuries are generally difficult to treat. This is because, firstly, the tail-bone is covered by fatty muscular pads of gluteus maximus. Secondly, this area is prone to pressure in sitting. You can try the following:
You can take Ultrasound and TENS at a private physiotherapy clinic.
Secondly, while sitting, try to transfer your body weight on buttocks.
While sitting, or standing, or sleeping on your abdomen, try repeated contractions of gluteus maximus (buttocks muscles).
Avoid sitting with your legs extended in front of you.
The pain does not disappear completely but there is no functional handicap following this injury. It generally takes 10 to 12 weeks for the pain to gradually subside.