She was suffering from a prolapsed vagina and hoped the treatment could avoid surgery.
It involves sitting over a hot water and herb mix, and has soared in popularity after endorsements from a raft of celebrities.
However, the victim was rushed to hospital and diagnosed with second-degree burns on her cervix and vaginal membranes.
She reportedly attempted the procedure on the advice of a traditional Chinese doctor.
“The vagina contains good bacteria, which are there to protect it”
Dr Vanessa Mackay
The woman sat over the boiling water for 20 minutes on two consecutive days.
Following the diagnosis, she required reconstructive surgery while she healed.
Dr Vanessa Mackay, a consultant and spokeswoman for the Royal College of Obstetricians and Gynaecologists, told the BBC it is a “myth” that the vagina requires extensive treatment.
She said: “The vagina contains good bacteria, which are there to protect it.
“Steaming the vagina could affect this healthy balance of bacteria and pH levels and cause irritation, infection (such as bacterial vaginosis or thrush) and inflammation.
“It could also burn the delicate skin around the vagina (the vulva).”
The report was published in the Journal of Obstetrics and Gynaecology Canada.
Author Dr. Magali Robert concluded: “Health care providers need to be aware of alternative therapies so that they can help women make informed choices and avoid potential harm.”