Causes of Knee Numbness

Numbness in the knee can be caused by a number of things. Some of these things are easily treated and others are far more complex. When you get numbness in the knee, it indicates a problem and needs to be evaluated by a physician. Some of the more common causes of numbness in the knee include kneecap dislocation, bursitis, tendinitis, strains or sprains, and autoimmune disorders like lupus.

Dislocated Kneecap

A dislocated kneecap can cause numbness in the knee. This condition occurs when the kneecap slides or moves out of its place. When a kneecap becomes dislocated it most often moves toward to outside of the leg. This condition is most often caused by an injury or a sudden change of direction while running. Other symptoms in addition to numbness in the knee may include pain and swelling affecting the dislocated kneecap.

Bursitis

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Bursitis can cause numbness in the knee. This condition occurs when the bursa in the knee becomes inflamed. The bursa can be found between a tendon and bone or a tendon and skin. It is a fluid-filled sac that helps to cushion the knee joint. Bursitis is most often caused by trauma, chronic overuse, infection, gout or rheumatoid arthritis. Other symptoms in addition to numbness in the knee may include swelling, pain and warmth around and over the affected knee.

Tendinitis

Tendinitis can cause numbness in the knee. This condition occurs when the tendon becomes inflamed, swollen or irritated. A tendon is a fibrous structure, also referred to as soft tissue, that connects muscles to bones. Tendinitis is most often caused by aging, trauma or overuse. Other symptoms in addition to numbness in the knee may include pain. This pain is often worse at night and when moving.

Strains or Sprains

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Strains, or sprains, can cause numbness in the knee. This condition occurs when muscles or ligaments tear due to overstretching. A ligament is a fibrous structure, also referred to as soft tissue, that connects bones to other bones. Strains and sprains can be caused by limited flexibility, not warming up completely and properly before exercise, and excessive exercise or physical activity. Other symptoms in addition to knee numbness may include swelling, pain and bruising on and around the affected knee.

Lupus

Lupus can cause numbness in the knee. This condition is an autoimmune disorder in which chronic inflammation is present. An autoimmune disorder is a disorder in which the body attacks itself. The exact cause of lupus is not known. In addition to knee numbness, some other symptoms of lupus may include fatigue, pain, nausea, skin rashes, swollen joints and hair loss.