Diagnostic Tests used for Evaluations No diagnostic tests would be advised for you unless it is a case of unremitting sprain or strain which has lasted several weeks and hasn’t improved as expected. An MRI could be advised to check for occurrence of damage to the discs. Treatment for Sprain Treatment in the beginning needs to comprise non–steroidal anti–inflammatory medications. A rehabilitation program involving physical therapy is also generally prescribed. Physical therapy with ultra–sound, heat and ice applied to the lower back region allows muscle spasms to relax. Exercises to stretch painfully contracted muscles which are in spasm, followed by muscle strengthening exercises would complete a physical therapy program.