Causes of leg pain include overuse, injury, or wear and tear in the bones, joints or muscles, according to Mayo Clinic. Medical conditions that cause leg pain include gout, fibromyalgia and sciatica.
Gout is a painful form of arthritis that occurs due to a buildup of uric acid in the body, notes the National Institute of Arthritis and Musculoskeletal and Skin Diseases. Uric acid builds up due to a variety of factors, including the inadequate filtering by the kidneys and consumption of foods high in purines. Gout causes uric acid crystal deposits in the joints, which produce symptoms such as pain, heat, swelling and stiffness, and kidney stones.
Fibromyalgia is a syndrome that describes unexplained pain in the muscles and joints, explains Healthline. Although doctors do not know what causes the condition, factors such as stress, physical trauma or a systemic illness can cause fibromyalgia flare-ups. Common trigger points of fibromyalgia include the tops of shoulders, hips and outer elbows. Symptoms of the condition include fatigue, anxiety, depression and headaches.
Sciatica is a symptom that describes shooting pain in the leg that can be excruciating, making sitting or standing difficult, according to Cleveland Clinic. Causes of sciatica include a herniated disk, piriformis syndrome and spinal stenosis. Common symptoms of the condition include numbness, weakness and a tingling sensation down the legs.