The "frozen faces", as people that get botox injected for cosmetic reasons are sometimes called, could have their emotional growth restricted. Especially if they are young.

Teenagers and people under 25 that recur to botox are steadily growing in number. But now a research suggests - and not for the first time - that they could be damaged emotionally.

Nurse practitioner Helen Collier carried out a research published on the Journal of Aesthetic Nursing. According to her study, reality TV shows and celebrity culture are driving young people to idealise the "inexpressive frozen face." But she points to a well-known psychological theory, the facial feedback hypothesis, that suggests adolescents learn how best to relate to people by mimicking their facial expressions. She warns that a "growing generation of blank-faced" young people could be harming their ability to correctly convey their feelings.

Ms Collier calls on therapists to spend time helping young people boost their confidence rather than reaching for injections.