Why do i have back pain after sleeping more than 7 hours?

Back pain oversleep: May be it is natures way of telling you , that you only need 7 hours sleep.There can be no medical reason why if you sleep more then 7 hours you will get back pain.As long as the pain do not last all day you dont have a medical problem.So get up after 7 hoyrs of sleep.

Morning low back pai: If the pain is accompanied with stiffness and you have a history of previous low back strains you may have a chronic ligamentous strain of the area. With ligamentous laxity the muscles will tighted around the unstable ligaments causing am pain and stiffness. See a physician who does prolotherapy to evaluate you for this.