What Causes Sever Pain Below The Hip?

End of day I can't relax because the bottom half of mybody is extreemly achy. I must constantly reposition in hopes of relief...8-12 months this has gone on...it's nearly 1 a.m. and again I am up ...also drymouth and constant chewing of ice....until I am freezing..still want more 51 y/o please help!