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.
Causes of Skin Crawling. Apart from some reasons mentioned above, there are several other causes that trigger the sensation of crawling skin. Awareness of these conditions can help diagnose the problem. Morgellon's Disease-Morgellon's disease is a condition that causes a crawling sensation on the skin.