It is  the  medical term of the sensation exactly resemble  like crawling of insects under the skin. it is one specific form of a set of sensation known as parasthesias, which also include the more common prickling tingling sensation known as pins and needles, formication is a well documented symptoms which has numerous possible causes.  formication is derived from latin word ant . formication may sometimes be experienced as felling of  itchiness ,tingling,pins,and needles burning or even pain. when formication is percieved as itchiness, it may trigger the scratch reflex and because of this some people who are suffring from the sensation are at risk of causing skin damage through excessive scratching.  in some instance static electricity can attract particulates to the skin and can cause body hair to move giving  a sensation like insects crawling over the skin. how ever in many cases no external trigger creates the sensation. in rare cases ,individuals become convinced that the sensat