A case study, involving a 62-year-old, was published in the Journal of Obstetrics and Gynaecology Canada.
The woman had been suffering from a prolapsed vagina and believed the treatment could help avoid surgery.
Vaginal steaming, which involves sitting over a hot water and herb mix, has seen a growth in popularity.
It and other treatments for intimate areas, including vulva facials, are now available at some salons and spas.
The LA Times first reported on the steaming trend in 2010, and it later gained widespread attention when Gwyneth Paltrow's Goop brand recommended it.
Last year, US model Chrissy Teigen also shared a photograph of herself undergoing the treatment.