Piriformis syndrome is a condition in which the piriformis muscle, located in the buttock region, spasms and causes buttock pain. The piriformis muscle can also irritate the nearby sciatic nerve and cause pain, numbness and tingling along the back of the leg and into the foot (similar to sciatic pain).
Sciatica refers to back pain caused by a problem with the sciatic nerve. This is a large nerve that runs from the lower back down the back of each leg. When something injures or puts pressure on the sciatic nerve, it can cause pain in the lower back that spreads to the hip, buttocks, and leg.
The labrum is a piece of fibrocartilage (rubbery tissue) attached to the rim of the shoulder socket that helps keep the ball of the joint in place. When this cartilage is torn, it is called a labral tear. Labral tears may result from injury, or sometimes as part of the aging process.
Trochanteric bursitis is inflammation (swelling) of the bursa (fluid-filled sac near a joint) at the outside (lateral) point of the hip known as the greater trochanter. When this bursa becomes irritated or inflamed, it causes pain in the hip. This is a common cause of hip pain.
Osteonecrosis of the hip develops when the blood supply to the femoral head is disrupted. Without adequate nourishment, the bone in the head of the femur dies and gradually collapses. As a result, the articular cartilage covering the hip bones also collapses, leading to disabling arthritis.
Snapping hip syndrome
Snapping hip syndrome (also referred to as coxa saltans, iliopsoas tendinitis, or dancer's hip) is a medical condition characterized by a snapping sensation felt when the hip is flexed and extended. This may be accompanied by an audible snapping or popping noise and pain or discomfort.
Sacroiliac joint dysfunction
Sacroiliac joint dysfunction is improper movement of the joints at the bottom of the spine that connect the sacrum to the pelvis. It can result in pain in the low back and legs, or inflammation of the joints known as sacroiliitis.
A stress fracture is a small crack in a bone, or severe bruising within a bone. Most stress fractures are caused by overuse and repetitive activity, and are common in runners and athletes who participate in running sports, such as soccer and basketball.
Mechanical back pain
Acute mechanical back pain is a common medical problem. Acute pain is pain that has been present less than 4 to 6 weeks. Mechanical means the source of the pain may be in the spinal joints, discs, vertebrae, or soft tissues.