A middle-aged woman from the Netherlands went to her doctor and described a medical first: she was having spontaneous orgasms that started in her left foot.

The sensations, which originated in the 55-year-old’s foot, were not triggered by sexual thoughts or feelings, she said. They took place five or six times a day and felt exactly the same way an orgasm felt while having sex, LiveScience reports.

"She felt terrible about it," Dr. Marcel D. Waldinger, a Dutch neuropsychiatrist who treated the woman and wrote a study about the case, said.

The study’s authors dubbed the disorder "foot orgasm syndrome" -- the only known case of its kind.

The woman, known in the study as Mrs. A., said the sensations started after she received treatment on her foot a year-and-a-half ago from a sepsis infection. Doctors said her foot may have experienced “partial nerve regeneration” whereby the brain may misinterpret foot stimulation as originating from the vagina, according to the study’s results.

Doctors said the woman’s MRI scans showed no foot abnormalities, but another test showed differences between the nerves of her right and left food. Touching her foot with an electric current induced an unwanted orgasm, Waldinger told LiveScience.

Mrs. A was treated with an injection of an anesthetic into one of her spinal nerves that stopped the foot orgasms. She has been orgasm-free for eight months but may need another injection if her symptoms return, Waldinger said.

Although the condition may be embarrassing to report, Waldinger says the treatment has proven to be effective. He recently created a website about the disorder.