A woman says she was left with concrete lips after paying £120 for lip fillers at a beauty salon.
Beth Craigs said she was left in agony by the cosmetic surgery, and now wants to warn others of the dangers.
The 21-year-old is one of a number of customers to have raised concerns about a woman renting a chair at a salon in Newcastle.
She took bookings through private message on Facebook, but has recently deleted her page and disconnected her phone.
Beth, a beauty therapist from Wallsend, said: There was massive swelling and they were extremely painful. I was really sore and my jaw and face were aching.
The pain was so bad and then they went rock solid, like concrete, and I could not move my lips.
Beth contacted the woman, who reminded her that she signed a disclaimer about swelling – though Beth pointed out they shouldnt go like concrete.
She then spoke to a doctor who confirmed that the reaction was not normal.
Questions have now been raised over the womans registration and qualifications and whether she was actually allowed to carry out the treatment.
Beth added: Anyone could be doing it. I wish I had checked. It should be a nurse, doctor or dentist going you go to.
Doctor Steve Land, who owns Novellus Aesthetics in Jesmond, Newcastle, and fixed Beths lips, said: Essentially, the problem is there is no regulations on who can give lip fillers. People can just set up their own clinics.
This problem has been going on for a while and I dont quite know how to fix it unless there is Government intervention.
You should make sure you go to a qualified doctor or nurse to get treatment. Anyone with the right qualifications will have them on display.
A city council spokesperson said their Trading Standards team is aware of the issue and investigating.