I had shatika and the only way I was able to cure it was that I used a bed position which was straight on the spine. If you have an old bed and when ever you get up in the morning you have extreme pain or you can't sleep all night because of shatika then change your bed!. That's the main point which I learned that if your bed is not right your spine will hurt.
Change the Bed or if you are on tight budget then sleep on the floor with some slight foam or carpet. Trust me it's worth it.