Lie on your back with your knees bent and feet flat on the floor. Place left ankle right below right knee, creating a “four” shape with left leg. Thread left arm through the opening you created with left leg and clasp hands behind right knee. Lift right foot off floor and pull right knee toward chest, flexing left foot. Hold for 30 seconds, then repeat on opposite side.
• Psoriatic arthritis. Psoriatic arthritis is a form of arthritis accompanied by the skin disease psoriasis. The skin disease often precedes the arthritis; in a small percentage the joint disease develops before the skin disease. For about 20 percent of people with psoriatic arthritis, the disease involves the spine. In some cases, bony overgrowth can cause two or more vertebrae to grow together, or fuse, causing stiffness.
The most common cause of sciatica is a herniated disk. Disks act like cushions between the vertebrae of your spine. These disks get weaker as you age and become more vulnerable to injury. Sometimes the gel-like center of a disk pushes through its outer lining and presses on the roots of the sciatic nerve. About 1 in 50 people will get a herniated disk at some point in life. Up to a quarter of them will have symptoms that last more than 6 weeks.
Grade III (severe): A complete tear in your muscle that causes severe pain and swelling and you can't bear weight on that leg, making it difficult to walk. You've also lost more than 50 percent of your muscle function. These injuries are less common and may need surgery to repair the torn muscle. They can take several months or more to completely heal.