A comment about exercise and stretching when fighting an episode of back-pain. Start moving around even during the bed rest stage (restricted bed rest is helpful, but you should gradually increase your activity level as soon as you can). Walking is one of the best and safest exercises. Other moderate activities are swimming, yoga, tai-chi etc. Start slowly and build up the number of repetitions. N...ever force your body beyond pain especially if there is an involvement of a nerve. Learn to trust your bodies signals. Consistency yields the best results. Personalize your exercise regime to strengthen and align your back with comfort. During a painful episode of back-pain I recommend to do stabilizing exercises rather than exercises that stretch and increase the curvature of the spine and increases the pressure on the intervertebral discs.