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.
Why does my skin feel like it's crawling? A: The sensation of crawling skin can be caused by allergies, medications, menopause, withdrawal symptoms and Morgellon's disease. The crawling skin sensation may also be caused by a high fever, skin cancer or herpes.