i started doing a exercise in the gym intially for one hourt and later for two hours. after 20 days the pain started in the lower back and i took some pain killer but the pain became more worse. i stopped the medicine and pain subside. after the rest of 6-7 days the dull pain remains in the lower back in right side. i started doing a exercise but i can't run properly. i start to pain again when i used to run continously for 10mins. i fear that if i start doing intense exercise then may be i will feel sharp pain again. what's ur suggestion. please do reply. thanks.