What is the primary cause of tendinitis?

The primary cause of tendinitis is inflammation due to joint overuse. This condition typically arises when tendons, which connect muscles to bones, are subjected to repetitive strain or excessive mechanical load. Over time, this leads to microtrauma and an inflammatory response in the tendon tissue, resulting in pain, swelling, and stiffness characteristic of tendinitis.

In many cases, tendinitis is seen in individuals who perform repetitive activities, such as athletes or workers engaged in movements that strain specific joints. The inflammation can also be aggravated by inadequate rest, improper technique, or insufficient conditioning. It's important to note that while infection, direct injury, and genetic factors can influence tendon health, they are not the primary causes of tendinitis, which centers around repetitive use and subsequent inflammation.