It is not known whether there have been scientific studies on this subject, or if there are proper terms for it. It seems as though only some people experience it, or experience it more greatly than others do. Some people claim not to experience feeling this at all and get quite perturbed or irritable when approached on the subject.
There have been several theories or guesses, such as a physical consciousness of dopamine release in the brain. What this mean is that you can actually “feel” the chemicals being released.
Others include narcolepsy- a tendency to fall asleep in relaxed situations. Some people who experience tingles have been diagnosed with this condition. Other include ESP, or another controversial one is that the subjects are Indigo Children- evolved or evolving human beings.