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.
Foot, Hip, Knee and Ankle Pain â Postural Lower Extremity Pain. 1  Hip pain after excessive sitting or hunching over a computer for hours at a time. 2  Foot and knee pain after standing, bending or being in an âawkward positionâ. 3  Knee and ankle pain after chronic posture stress such as carrying a heavy backpack, purse, or child.