- 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.
- Hematoma
A hematoma is a collection of blood in the tissue outside of a damaged blood vessel, usually after an injury.
- Tendinitis
Tendinitis symptoms include muscle and tendon pain or stiffness close to a joint, and pain with movement.
- Bursitis (anserine)
Anserine bursitis is a swelling of the bursa at the inside of the knee and causes pain, redness and stiffness.
- 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.
- 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.
- Posterior cruciate ligament (PCL) injury
A posterior cruciate ligament injury causes pain, swelling, weakness and instability of the knee.