Sir my sister is 20 years old she fall from the back sit of a bike on her back sitting on ground about 6 months ago. There is nothing found on the X-ray test. But if she walks or stand for some more time, she feels pain at night, when she takes rest in the lower portion of her back. The local orthopaedics advised some exercises to do daily two times and didn't prescribed any special medicines. But the pain is very transparent and annoying. Please suggest what to do.