Bursitis is the inflammation of the fluid-filled sac or bursa that helps cushion the joint. It develops most often because of pressure on the front of the joint. Treatment may include anti-inflammatory medicines to relieve pain and inflammation or an injection of a steroid drug. Bursitis usually lasts between two and three weeks. Sometimes, if the condition is recurring in the same area, surgery may be recommended to remove the bursa. 

Tendinitis is an inflammation of the tendons that connect the muscles to the joint. The most common is patellar tendinitis, in which the tendon that connects the bones becomes inflamed. Most often this condition results from overuse, but it also can be the result of an injury. Tendinitis may respond well to first aid measures, such as rest, elevation, ice therapy, aspirin or ibuprofen. However, a torn tendon may require surgical repair, followed by stabilization for several months.