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.
Formication or Crawling Sensation of skin can be extremely frustrating. It causes harm to the surface of the skin and at the same time a person may feel embarrassed if they are suffering from this skin trouble. This feeling of crawling on the skin may be somewhat similar to that of tingling, needles or pins feeling. Medically, crawling of skin is known as formication.