One of the most common causes of a coccyx injury is bad posture. If the pressure on the coccyx is reduced, Coccydynia will usually go away in a few weeks, on its own. However, care should be taken while sitting, walking, exercising and even while sleeping to ensure that coccyx is not under too much pressure.
Use appropriate support-pillows or a donut-shaped cushion while sitting and sleeping to ease the pain due to coccyx injury. Also, managing your sleeping position will help manage the pain, as certain postures apply more pressure on the area than the others. The neck pillow used should be of the correct height to keep your neck and spine straight. If you are a side sleeper, you could also use a small pillow between your legs, which will help prevent the stress on the back and keep the hips from twisting. If you are sleeping on your back, make sure to keep a pillow under your knees. Make sure the mattress you sleep on is firm. You could also try putting an ice pack on your back as ice aids in preventing tissue damage, while also helping to decrease the swelling and pain. Applying hot pads before going to bed will also help ease the pain. If the pain prevails, you could take one of the anti-inflammatory drugs before sleeping.