Pressure is increasing for tighter regulation so only properly qualified, trained and accredited professionals can administer the treatment and the fillers are properly tested
Far more serious complications have been recorded. In November last year, experts reported that a female patient went permanently blind in her left eye after having filler injected because it blocked an artery feeding the eye. Similar cases have also been reported, where injected filler has put pressure on blood vessels feeding the retina, starving it of oxygen, causing visual problems and blindness.
Doctors saw a woman complaining of a swelling on her forehead - the filler she'd had injected in her eyebrows a decade earlier had migrated across her head
Fillers can be divided into two main groups; temporary ones made from hyaluronic acid, which is eventually absorbed into the body, and more permanent ones made from other materials that can remain in the body for many years.
Temporary ones are less dangerous, but with most the effects last between three months and a year. Experts warn that all dermal fillers can induce serious and potentially long-lasting adverse effects.
Permanent filler can shift from its injection site to other parts of the body. Doctors at the University Hospital Coventry and Warwickshire NHS Trust described a case earlier this year where a woman was sent to them complaining of a swelling on her forehead.