fact, it’s an uncontrollable condition called persistent genital arousal disorder (PGAD), and might be caused by nerve damage to the spine, a new study reveals. Stumped by the disorder for years, doctors at the Massachusetts General Hospital finally found a link between PGAD and damaged nerves in the spine that cause the sensation of arousal in human bodies, states the study published Thursday in PAIN Reports. Doctors conducted the research — which is the first of its kind — on 10 women who developed PGAD symptoms between the ages of 11 and 70 years old. Four women were found to have nerve-root cysts, two showed signs of sensory nerve damage, one was born with a spinal cord defect and another had a herniated disc in her lower back. Another experienced short-lived constant arousal after she abruptly stopped taking an antidepressant. Most of the women experienced daily feelings of sexual .