Paresthesia

n. abnormal sensation, imaginary sensation

Paresthesia or paraesthesia (in British English) is a sensation of , , or of a person's skin with no apparent long-term physical effect, more generally known as the feeling of pins and needles or of a limb being "asleep" (but not directly related to the phenomenon of sleep). Its manifestation may be transient or chronic.
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Paresthesia /par·es·the·sia/ morbid or perverted sensation; an abnormal sensation, as burning, prickling, formication, etc. [more]Paresthesia - Community and Resources

Noun
1. abnormal skin sensations (as tingling or tickling or itching or burning) usually associated with peripheral nerve damage
(synonym) paraesthesia
(hypernym) symptom
(hyponym) formication

An abnormal sensation of the body, such as numbness, tingling, or burning.