Researchers said there is a growing trend for under-25s to seek the wrinkle-smoothing injections.
However, "frozen faces" could stop young people from learning how to express emotions fully, researchers wrote in the Journal of Aesthetic Nursing.
Botox and other versions of the toxin work by temporarily paralysing muscles in the upper face to reduce wrinkling when people frown, 'BBC News' reported.
Helen Collier, nurse practitioner in Musselburgh, near Edinburgh, who carried out the research, said reality TV shows and celebrity culture are driving young people to idealise the "inexpressive frozen face."
A "growing generation of blank-faced" young people could be harming their ability to correctly convey their feelings, she said.
"If you wipe those expressions out, this might stunt their emotional and social development," she added.