Tendonitis in the knee is the inflammation of the fibrous tissue that connects muscles to bone in the knee. The hamstring tendon and the patellar tendon are commonly effected. Hamstring tendonitis is the inflammation of the tendon that connects the large muscle in the back of the leg (biceps femoris) to the back of the tibia (shinbone). Hamstring tendonitis occurs from running on uneven surfaces, lifting heavy weight or performing intense physical activity.
The patellar tendon connects the thigh (quadriceps) muscles to the tibia and runs over the kneecap. Tendonitis in this area is often caused by excessive running or jumping during physical activity; it is common in young, growing athletes. However, according to Medline Plus, patellar tendonitis may occur in older adults, too, because the tendon loses elasticity and resilience with age. Schedule an appointment with your doctor if you are experiencing the symptoms of tendonitis.
Knee Pain
Pain is the first symptom that you will notice with knee tendonitis, according to the Mayo Clinic. It is described as dull and achy by most patients. Medline Plus states that this pain is located along the outside of the knee (hamstring tendonitis) or just below the kneecap (patellar tendonitis) and is worse with movement or at night. Pain occurs because inflammation of the tendon causes chemical signals to be released that are related to pain. Rest, ice and over-the-counter (OTC) anti-inflammatory pain relievers are commonly used to relieve pain. See your doctor if this conservative treatment does not provide relief.
Swelling
Swelling is a common symptom associated with knee tendonitis. Swelling occurs because a stretched and overused hamstring or patellar tendon causes a release in chemical signals that attract fluid to the area of inflammation. You may notice swelling in the area outside of the knee or just below the kneecap. Apply ice to the area and elevate your knee above the level of your heart to relieve your swelling. If these treatments are unsuccessful, consider taking OTC medications to ease the swelling.
Tenderness
Tenderness is an associated symptom of knee tendonitis. Your doctor will check for tenderness if she suspects the condition. Tenderness may occur because swelling around the knee stretches sensory nerves, which causes tenderness. If pressure is applied to this area, your pain will become worse. Although there are other conditions that can cause tenderness in the knee, tendonitis will be suspected if your X-rays are normal.
