Your hips are just one of the areas of your body that are prone to tightness and injury if you are a runner. Every stride that you make requires your hip joint to pull forward, and every time that you plant your foot on the pavement, your hips feel the impact. Performing hip stretches before and after a run can help you avoid injury and keep your hips loose and limber. Ease into your hip stretches and do not bounce. Try to hold each one for 30 to 40 seconds and stop if you feel any discomfort.
Apply the above concept to your hips. When you sit, your hips are in a "flexed" position. Therefore, the muscles that flex your hips are in a shortened state. You probably spend at least a third of your day sitting down. Think about how much time those hip flexor muscles stay shortened. A lot. Over time, they become tighter and tighter until you look like the old man in the picture. So unless you want to look like that, perform the stretches shown below.
Piriformis syndrome is not considered a serious injury—so RICE is in order for pain caused by triggers, like sitting too long. RICE is Rest, Ice, Compression, and Elevation. Also, see a primary care doctor or neurologist (nerve specialist), who can recommend physical therapy exercises and exercises for hip pain and other specific types of pain that will help you feel better. Also, a physican therapist can suggest ways exercises that provide pinched nerve relief, as nerve pain relief is what is primarily needed here.
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.