When you use a set of muscles too much, you’re likely to strain the tendons (soft tissues) that connect those muscles to your bones. At first, pain or swelling may come and go quickly. But if you do too much too soon, your muscles may overtire again. The strain may cause a tendon’s outer covering to pull apart.

If you keep pushing your muscles, damage to the tendons adds up and tendonitis develops. Over time, pain and swelling may limit your activities. But with your doctor’s help, tendonitis can be controlled. Both your symptoms and your risk of future problems can be reduced.

Note: Left untreated, tendonitis can put you at risk for further injury, such as a ruptured tendon or a sprain.

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