Coal, oil and natural gas are three main types of fossil fuels. Fossils fuels are combustible materials that are formed over millions of years by the decomposition of plant and animal life. Continue Reading.
Some of the possible common medical causes of Extremity pain may include: 1  Brachial plexus lesions. 2  Carpel tunnel syndrome. 3  Biceps tendonitis.  Raynauds 1  phenomenon. Sickle cell anemia.  Black widow spider 1  bites. Polyneuropathy.  Cat scratch 1  disease. Post herpetic neuralgia.  Erythema nodosum.
Hip osteonecrosis causes pain in the hip joint.. Orthopedics. Hip osteonecrosis, also called avascular necrosis, is a problem with the blood supply to bone of the hip joint. This condition occurs when there is an interruption of the blood flow to the head of the femur (the ball, of the ball-and-socket hip joint).