This joint irritation and swelling can cause pain in the buttocks or lower back. The pain can go down one or both legs.
Disease
Septic arthritis
Learn about this painful infection in a joint and why quick treatment can help lessen joint damage.
Disease
Scleroderma
This group of rare diseases involves the hardening and tightening of the skin and connective tissues. Some forms can affect internal organs.
Disease
Rheumatoid arthritis
This ongoing condition can affect more than just the joints. It also can damage skin, eyes, lungs, heart and blood vessels.
Disease
Thoracic outlet syndrome
This group of conditions is caused by pressure on the blood vessels or nerves between the collarbone and rib. The pressure can cause pain and numbness.
Disease
Desmoid tumors
Learn about this rare type of tumor, including symptoms, diagnosis and treatment.
Disease
Ulnar wrist pain
Ulnar wrist pain occurs on the side of your wrist opposite your thumb. The pain can become severe enough to prevent you from doing simple tasks.
Disease
Golfer's elbow (Medial epicondylitis)
Golfers, tennis players and others who repeatedly use their wrists or clench their fingers can develop this painful condition.
Disease
Hamstring injury
Self-care measures, such as rest and ice, might be all that's needed for an injury to one of the hamstring muscles.
Disease
Muscular dystrophy
Find out about the various types of this condition, which affects muscles over time. Then learn about treatments to help with the symptoms.
Disease
Priapism
Understand the symptoms, possible causes and treatment of prolonged erection of the penis, including when to seek emergency care.
Disease
Binge-eating disorder
People with this condition often don't feel able to stop eating and may eat larger than usual amounts of food. Learn about symptoms and treatment.