Cleaner Zara, 30, has a disorder called Persistent Sexual Arousal Syndrome (PSAS), which means she can have up to 500 orgasms a day.
She says: “People think I must be in ecstasy every day but constantly having orgasms is ruining my life.
“I have no control over the way my body feels and it affects every aspect of my life.
“The simplest act can cause me to have an episode — it’s an exhausting way to live.”
Zara, from Basingstoke, Hants, says: “It often happens when I walk up the stairs, drive over speed bumps and whenever my phone vibrates in my pocket.
“I’ll also have an orgasm when I’m reaching for food at the supermarket, walking through turnstiles, pushing a shopping trolley and even when someone sits next to me on the sofa.
“I wake up feeling aroused and go to bed feeling that way.
“I can be standing in a queue at the supermarket and feel the PSAS start. And there is nothing I can do to stop it.
“Train journeys are a nightmare as the movement of the train can trigger an attack.
“It has put me off sex and made me depressed.”
PSAS was first documented as a medical disorder in 2001. Zara was diagnosed in 2010 after constantly feeling aroused.
She says: “It sort of crept up on me. I started feeling sexually aroused all the time and put it down to my hormones changing.
“But even after I had sex with my boyfriend at the time, Rob, I’d never feel satisfied.
“The feeling would never go away — I’d try to distract myself by doing exercise, having hot baths or watching a depressing film, but the sensation continued.
“After two months of suffering in silence, I knew the way I was feeling wasn’t normal.
“I knew I had to tell my GP, but the idea of confessing that I couldn’t stop having orgasms was terrifying. I thought a doctor would laugh at me or think I was a crazed nymphomaniac.
“But I was having up to 500 orgasms a day. It was ruining my life.”
Then Zara had a breakthrough: “I found websites and forums relating to PSAS,” she says. “As I read what other women were experiencing, I felt like a weight lifted from my shoulders.
“I wasn’t going crazy and there were other women out there like me.”
With this new knowledge, Zara went to see her GP, who diagnosed her with PSAS.
She says: “My doctor prescribed a course of mild anti-depressants, painkillers and anti-inflammatories for my bad days.” Zara also uses hot and cold packs to stop the orgasms occurring.
She says: “I will sometimes sit with a packet of frozen carrots or peas wrapped in a tea towel over my parts because the coolness stops me wanting to orgasm.”
She finds support on internet forums and says: “One sufferer in the US told me she has ‘orgasm days’ were she tries to deplete her body of the desire to climax. I do that once or twice a month.
“It’s so embarrassing and I don’t enjoy it but it does work. I will spend the day in bed in a darkened room, trying to get them out of my system. It doesn’t feel good — in fact, it’s often very painful.
“After one of those days I can normally have a good few days free of the dreaded attacks.
“Treating this syndrome is hit and miss and it’s made me terribly depressed at times.
“I don’t go out much as when I do, I spend most of the time in the toilets trying to stop the orgasm attacks.
“Restaurants are a nightmare as when sitting still for long periods the pain of orgasms builds up. I’ve been to job interviews and the syndrome’s hit.”
Suffering with PSAS has also ruined Zara’s love life as no man feels able to satisfy her in the bedroom.
Currently single, she finds the idea of dating and telling a new boyfriend about her syndrome too terrifying to contemplate.
She says: “My relationship with Rob broke up because he couldn’t cope with the fact there was no way of satisfying me sexually.”
Rob, 33, says: “I honestly couldn’t cope with the PSAS. Zara told me I was good in bed and that her syndrome made her feel dissatisfied — not me.
“For a man, it’s really difficult to get your head around.”
Zara is planning to take part in global studies to help specialists learn about the syndrome.
She says: “I want my body back and to have a normal sex life. PSAS has destroyed my daily life as anything can trigger an orgasm. It’s a nightmare.”
Zara is setting up a website to raise awareness and tell her story to other sufferers.
She says: “It’s painful, debilitating and certainly is not fun.”
Read more: UK Sun