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.
Lower extremity swelling can be caused by trapped fluid. Causes of trapped fluid include: 1  acute kidney failure. 2  cardiomyopathy (disease of the heart tissue). 3  chronic kidney failure. 4  heart failure. 5  hormone therapy. 6  lymphedema (blockage in the lymph system). 7  nephrotic syndrome (damage to the vessels in the kidneys).