In mechanics, a force is that which causes a change in velocity or, if you prefer, that which causes an acceleration. When more than one force acts on an object it is the net force that is important. Since force is a vector quantity, use geometry instead of arithmetic when combining forces.
Quick Answer. A crawling sensation felt on the skin may be caused by a condition called morgellons, according to WebMD. Common symptoms of morgellons include feeling like bugs are crawling on the skin, burning, itching and stinging sensations. In some cases skin sores may appear as well.
Hives or urticaria is one of the skin conditions that may cause itchy bumps all over body. Hives is a sudden outbreak of swollen, pale red bumps on the skin. These bumps or plagues sometimes result from allergic reactions. This condition causes burn, sting and itchiness. The bumps caused by hives can appear on your face, tongue, lips, ears, throator any other part of the body. Hives are in different sizes and sometimes several hives join together to form plagues. They last between hours to a day on your skin and then clear.