A British mother-of-five is thought to be the first person to have died in the UK from a Brazilian Bum Lift.
Alice Webb, 33, died in the early hours of Tuesday morning after having cosmetic treatment in Gloucester.
Two people have been arrested on suspicion of manslaughter, Gloucester Police said.
Ms Webb had been having cosmetic surgery, but the emergency services rushed to a house on Monday evening at around 11.30pm after the alarm was raised.
She was taken to the Gloucestershire Royal Infirmary but died shortly after in the early hours of Tuesday morning.
In an emotional tribute online, her partner Dane Knight saying: “Want to say a heartfelt thank you to all family and friends that were here for us at our time of need, including all of the kind messages sent to my children and myself.
“There [were] some very beautiful messages sent by some of your children that formed a start of a smile from the corner of my kids’ mouth.”
A GoFundMe has been established to help Ms Webb’s family, with friend Abigail Irwin writing: “I am hoping to raise as many funds as we can to support Dane, the partner of Alice and their five beautiful children at this very difficult sad time.
“Alice passed away Monday evening after having the BBL treatment which has gone wrong.
“Alice joined the beauty & Aesthetics industry two years ago and she has been smashing it, doing amazing.
“She cared about her clients, she would always check in to see if they were OK, Alice was a beautiful person inside and out and I feel very lucky to have known her and to have spent time with her in our salon.
“Alice would ask for advice all the time and ask to check if there was anything more she could do to improve her skills but she was just a pure natural and never needed my help but always wanting to be the best at her job and that she was.
“Alice has passed away at a young age of 34. Alice was beautiful inside and out with the biggest heart, her family was her world she is leaving behind her partner Dane & 5 beautiful children.
“As you can imagine this is a very difficult heart breaking time for them all so if we can all help donate or share to help take of some financial stress it would be really appreciated by the family.”
A Gloucestershire Police spokesperson confirmed two people have been arrested on suspicion of manslaughter.
“Police had been called by the ambulance service at around 11.35pm on Monday (23 September) with a report a woman had become unwell following a suspected cosmetic procedure,” said the spokesperson.
“She was taken to Gloucestershire Royal Hospital and died in the early hours of Tuesday morning. Her next of kin and the coroner are aware.
“The woman’s family are being supported by specially trained officers.
“An investigation, led by the Major Crime Investigation Team, is ongoing. The two people who had been arrested have been released on police bail.”
It comes after an east London council separately on Tuesday warned of the dangers of Brazilian Butt Lifts.
Redbridge Council said it was particularly concerned by a non-surgical variant of the cosmetic procedure called “liquid BBL” which is unlicensed and unregulated.
