I found this on Quora:
What medical condition from history was treated with a technique we might consider highly inappropriate today?
In the 1913 study, The Sexual Impulse in Women, it was reported that about 75% of women suffered from “hysteria,” a condition with symptoms ranging from headaches to epileptic fits to verbal outbursts. It was essentially akin to epilepsy.
Any female behavior could be deemed as an indicator of hysteria, and the primary treatment was pelvic massage: clitoral stimulation was a palliative cure for this condition.
Who was supposed to handle this? The doctors, who apparently found no pleasure in doing so!
For Victorian women, clitoral stimulation was not even considered a sexual act, as it was believed that they were incapable of experiencing sexual desire.
If a woman moaned during a pelvic massage, she was said to be having a “hysterical paroxysm.” After reaching this state, patients would temporarily ease their issues.
The invention of the steam-powered vibrator came as a savior for these specialist doctors, relieving them from the hand-cramping work.