- Osteoarthritis
Osteoarthritis happens when the cartilage in your joints breaks down causing pain, stiffness, and swelling.
- Bruise or contusion
Bruises, or contusions, cause skin discoloration, swelling and tenderness.
- ACL knee injury
An ACL injury happens when you tear or overstretch the anterior collateral ligament on the inside of the knee.
- Osteochondritis dessicans
Osteochondritis dissecans is a joint problem that causes pain, swelling, and a locked up joint.
- 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.
- Patellofemoral pain syndrome
Many people with pain around the kneecap have patellofemoral pain syndrome.
- Sarcoidosis
Sarcoidosis is a rare disease that can cause swelling and hard lumps in the lymph nodes and organs.
- Tendinitis
Tendinitis symptoms include muscle and tendon pain or stiffness close to a joint, and pain with movement.
- Repetitive motion injuries
Repetitive motion injuries can cause numbness, tingling, and weakness in a hand, arm, leg, or foot.
- Bursitis (anserine)
Anserine bursitis is a swelling of the bursa at the inside of the knee and causes pain, redness and stiffness.
- Septic arthritis
Septic arthritis, a joint infection, causes severe pain, swelling, redness, and warmth in the joint and fever.
- Slipped capital femoral epiphysis
A slipped capital femoral epiphysis can cause knee pain, walking with a limp, hip pain, and more.
- Knee strain
A knee strain is a stretch or tear of a muscle or of a tendon and causes pain, swelling, and bruising.
- Trauma or injury
Trauma most often refers to serious bodily injury or wounds symptoms range depending on the injury.
- Obesity
Obesity is having too much body fat, marked by a BMI of 30 or higher.
- Stress fractures
Stress fractures are small breaks that usually occur in the feet or leg bones, causing pain and swelling.
- Ulcerative colitis
Ulcerative colitis causes swelling in the large intestine and can lead to cramping, diarrhea, and more.
- Bursitis (pre-patellar)
Prepatellar bursitis, a swelling of the bursa in front of the kneecap, causes pain, redness, and stiffness.
- Sickle cell crisis
Sickle cell crisis causes sudden pain, shortness of breath, low grade fever, nausea, vomiting, or diarrhea.
- Sickle cell disease
Sickle cell disease symptoms include repeated infections, yellow skin, fatigue, dizziness, pain, and more.
- Sporotrichosis
Sporotrichosis is a fungal infection that can cause painless bumps on the fingers, hands, and arms.
- Psoriatic arthritis
Psoriatic arthritis most often causes swelling and joint pain in the fingers and toes.
- Rheumatic fever
Rheumatic fever is an inflammatory disease and causes fever, joint pain, abdominal pain, rash, and more.
- Knee meniscus tear
A meniscus tear, damage to a piece of cartilage in the knee, causes pain and swelling.
- Dislocated knee
Symptoms of knee or kneecap dislocations include pain and swelling in the knee, stiffness, and deformity.
- Lupus (systemic lupus erythematosus)
Lupus is a chronic autoimmune disease marked by swollen painful joints, a rash, swollen lymph nodes, and more.
- Osgood-Schlatter disease
Osgood-Schlatter disease causes a painful swollen bump on the shin below the knee.
- Gout
Gout is a buildup of uric acid in the joints, causing joint pain, fever, and hot, red, swollen joints.
- Juvenile rheumatoid arthritis
Juvenile rheumatoid arthritis or JRA is a long-term disease that causes pain and swelling in children's joints
- Lyme disease
Lyme disease is a bacterial infection spread through tick bites; symptoms include rash, fever chills, and more.
- Crohn's disease
Crohn's disease is a digestive condition that causes swelling, cramping, diarrhea, and nutritional problems.
- Posterior cruciate ligament (PCL) injury
A posterior cruciate ligament injury causes pain, swelling, weakness and instability of the knee.
- Henoch-schonlein purpura
Henoch-Sch�nlein purpura is a condition that causes a purple bruise-like rash on the legs and buttocks.
- Shingles (herpes zoster)
Shingles is a painful, blistering, skin rash typically found on the back and sides of the chest.
