What Is Tenosynovitis?

What Is Tenosynovitis?

Tenosynovitis is the swelling of the fluid-filled sheath that surrounds and protects tendons within the body. Tendons are the rope-like structures that connect our muscles to our bones, making physical movement possible. They are surrounded by a protective sheath called the synovium which provides lubrication and protection while the tendons are at work, allowing them to glide easily creating smooth, painless motion.

If the synovium is damaged in any way, either through an injury or an infection, it can reduce the smooth running of the tendons which in turn can cause pain, inflammation and difficulty in movement. Tenosynovitis, sometimes referred to as Tendon Sheath Inflammation, can occur in any tendon that is protected within its synovium and is most common within the hands and wrists, and sometimes the feet, but it can also affect shoulders, elbows and knees.

While it can be caused by an infection or an injury, in a great deal of cases it is caused by repetitive motions or prolonged physical activity. In some situations the condition can go away within a few days of rest or treatment, while in other cases it can become prolonged and last for a long time – sometimes with debilitating consequences.

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