- Osteoarthritis
Osteoarthritis happens when the cartilage in your joints breaks down causing pain, stiffness, and swelling.
- ACL knee injury
An ACL injury happens when you tear or overstretch the anterior collateral ligament on the inside of the knee.
- Bursitis (anserine)
Anserine bursitis is a swelling of the bursa at the inside of the knee and causes pain, redness and stiffness.
- Tendinitis
Tendinitis symptoms include muscle and tendon pain or stiffness close to a joint, and pain with movement.
- Hematoma
A hematoma is a collection of blood in the tissue outside of a damaged blood vessel, usually after an injury.
- Pseudogout
Pseudogout is a type of arthritis similar to gout, where crystals form in the joints, causing swelling and pain.
- Rheumatoid arthritis
Rheumatoid arthritis is an autoimmune disease that causes pain, swelling, and joint damage.
- Cellulitis
Cellulitis, a bacterial infection of the skin, causes red, tender skin that is usually swollen and warm.
- Dislocated knee
Symptoms of knee or kneecap dislocations include pain and swelling in the knee, stiffness, and deformity.
- Sarcoidosis
Sarcoidosis is a rare disease that can cause swelling and hard lumps in the lymph nodes and organs.
- Abscess
A skin abscess, or boil, is a swollen, painful, red and warm lump of skin that may rupture and drain pus.
- Bruise or contusion
Bruises, or contusions, cause skin discoloration, swelling and tenderness.
- Osteochondritis dessicans
Osteochondritis dissecans is a joint problem that causes pain, swelling, and a locked up joint.
- Patellofemoral pain syndrome
Many people with pain around the kneecap have patellofemoral pain syndrome.
- Posterior cruciate ligament (PCL) injury
A posterior cruciate ligament injury causes pain, swelling, weakness and instability of the knee.
