I think you should mention that for some people, stretching is not the solution and that it will deteriorate their posture. Some people need stretching, but most people I know need to strengthen their "overstretched" hip flexors. Many people can't do a single hanging leg raise. Check this site if you want to know more about the importance of hip flexors bit.ly/Unlock_Your_Hip_Flexor Report
If your sciatica is due to a herniated disk, and it's still causing severe pain after four to six weeks, surgery may be an option. The surgeon will remove a portion of the herniated disk to relieve the pressure on the sciatic nerve. About 90% of patients get relief from this type of surgery. Other surgical procedures can relieve sciatica caused by spinal stenosis.
An ideal pose for stretching out your hips, lower back, glutes, hips, and knees, it also can help to relieve sciatica. Start on your back with your knees bent, and your feet hip-width apart and flat on the floor. Raise your right foot and rest it on top of your left thigh above your knee. Thread your right hand between your legs and grip the back of your left thigh, bringing your left hand to meet it. Pull both legs toward your chest as far as you can. Take 8-10 breaths, and then release. Switch legs, and repeat.
Grade II (moderate): A larger tear in your muscle that makes it difficult to move and causes a moderate amount of pain, especially when you move the affected muscle, swelling, and tenderness. You may have 5 percent to 50 percent loss of function and you may be limping. You can't go back to sporting activities until the tear is completely healed. These injuries can take anywhere from a couple weeks to a few months to heal, depending on how bad they are.