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Researchers have warned that botox injections can leave patients feeling depressed. Methods to treat crows’ feet, which involve the Botulinum toxin, have been found to reduce the strength of muscles in the eye area, preventing patients from smiling and showing happiness in their faces.

A minimal number of 25 entered into the study, commissioned by a psychologist at Cardiff University, and were required to answer questions in a one-off questionnaire, created to measure the levels of depression in participants.

The study looked specifically at facial feedback – a notion which looks at the facial expressions we make and how this affects the emotions we feel.

Dr Michael Lewis, reader at the school of psychology in Cardiff, said that the results of the study demonstrated how feelings of depression were higher in the group who’d been treated for crows’ feet and frown lines. He compared this to a group who’d undergone treatment for frown lines alone and concluded that the outcome showed how treatment “reduced the strength of a smile” and as a result made people less happy.

“Treatment with drugs like Botox prevents the patient from being able to make a particular expression.” he said.

“For example, those treated for frown lines are not able to frown as strongly. This interrupts the feedback they would normally get from their face and they feel less sad.”

The Royal College of Surgeons states that only trained doctors, nurses and dentists can offer non-surgical cosmetic treatments to patients including Botox.

If you or a loved one has had cosmetic treatment from someone who wasn’t qualified and the treatment has gone wrong, Mercury Legal Online can help you. Contact us on 0800 122 3130 or get in touch via our dedicated website at www.botoxgonewrong.co.uk.