Experts are now blaming that the strange twitching disorder is spreading quickly through social media.

Dr. Laszlo Mechtler, chief of neurology at the Dent Neurologic Institute in Buffalo, NY said, "The girls' symptoms are not physical but mental. It's as if it's a domino effect, where one girl gets it and then the others somehow copy her without really knowing that they are doing so." Experts do not know the exact neurologic pathway, but believe the common factor is stress and anxiety.
Even professor of neurology at the University of Buffalo, Lichter said, "This mimicry goes on with Facebook or YouTube exposure. This is the modern way that symptomatology could be spread."
Source-Medindia