You also agree that your personal information may be transferred and processed in the United States, and that you have read and agree to the Terms of Use and the Privacy Policy. Expression Interactive Designer is one of three products in Microsoft's Expression suite of tools for Web designers.
Sensitive areas of tight muscle fibers can form in your muscles after injuries or overuse. These sensitive areas are called trigger points. A trigger point in a muscle can cause strain and pain throughout the muscle. When this pain persists and worsens, doctors call it myofascial pain syndrome. 1  Symptoms.
Tight muscles that are stretched create pain and count for some myofascial pain cases. However in a lot of cases, the muscular pain comes from what are commonly referred to as knots in the muscle. This is when contracted and tight muscle builds up in a small focal area to the point where it almost feels like a little lump or nodule.