Katy Johnston shares her personal fight with the illness, and why it's time to make the invisible visible, as Standard Life partners with Endometriosis UK

"On a bad day, I can't move. I just need to be in bed, with hot and cold compresses. It really is a debilitating, stabbing pain – like someone sticking a knife in you repeatedly, and there's no relief from it. I'll be sweating, unable to function, on all fours mooing like a cow. Every day I've got pain of some form."

"A good day is when I can get about, complete my daily tasks and achieve things, without being shattered at the end of the day, but there's always a lingering ache. It's a chronic condition, so you carry it with you."

For 23-year-old student and journalist Katy Johnston, debilitating periods have been the norm since the age of 16. "I'd be in blackout pain for three days, couldn't leave my bedroom, and I'd make plans around those few days of the month that I knew were going to essentially be lost to pain," she says.

It wasn't until she was doing a post-grad at uni, aged 22, that Katy was finally diagnosed with endometriosis – an incurable condition where the endometrial cells, like those from the lining of the womb, grow elsewhere in the body. It typically affects other pelvic organs, and can cause pain, inflammation, fatigue, bowel and bladder problems, and in some cases, infertility.

Katy is far from alone in suffering with this invisible illness. One in ten women in the UK – around 1.5 million – currently live with endometriosis, but the condition is still relatively unknown, and the average diagnosis time is seven and a half years.

Standard Life, the life savings company, this week announced a new partnership with Endometriosis UK, the leading source of support and resource for women in the UK affected by this invisible and chronic condition. As the first brand to support the charity in this way, they're committed to raising awareness of experiences like Katy's, opening up stigma-busting discussions, and taking better care of its own customers, clients and colleagues.

In Katy's case, despite repeatedly mentioning her painful periods to her GP, nobody – including Katy – thought much of her symptoms for years. "You just accept you're unlucky and have bad periods. You have nothing else to compare it to, so you don't really know what's normal, and there's still that ick factor around periods where no one really talks about it. But if it was any other pain that was recurring and causing that much devastation, you would question it," Katy reflects.

"Looking back, painful sex was another really big symptom, which no one talks about either. I didn't know how to compare my experience of sex with anyone else's, so I just didn't mention it," she adds. "You don't want to cause a scene or be labelled a hypochondriac."

By the time Katy was referred for scans last year, she was vomiting six or seven times a day, rapidly losing weight, and in constant abdominal pain. "For a period of about eight weeks I was housebound because I physically couldn't walk further than the shops. I ended up in A&E after passing out from the pain, and was given morphine to get through it," she says.

Scans and an initial surgery found that Katy's bowel was fused to her uterus, and her right fallopian tube was the same size as her womb. "My whole world's been turned upside down. I've had to drop out of my postgraduate course, which was soul destroying. As someone who's fiercely independent and really goal-oriented, it almost felt like a failure to say I needed a time out," she says.

"I'll need another surgery next year, and I'm currently on injections to stop me ovulating, which also induce a temporary early menopause. Not only am I still coming to terms with all this stuff, I'm also now getting hot flushes and bizarre menopausal symptoms that no 23-year-old should have to deal with," Katy explains. "You just have to laugh really, because I'm having hot flushes at the same time as my mum and her pals."

While she waits to be well enough to complete her course, Katy's been picking up bits of freelance journalism and radio presenting, but she does worry about how endometriosis will impact on her future career.

"The work I'm doing now is freelance, so it's really flexible, but the bottom line is there's no stability and no security. If I don't work, I don't get paid. There's no holiday cover, there's no schemes in place for me to ensure I can pay the bills when I'm sick," she says.

"And realistically, for me, there's going to be more operations on the horizon, there's going to be days when I won't be able to get out of bed, or give two weeks’ notice when I can't do a job," she adds. "I will just have to be that woman who's unreliable and flaky – which is horrifying for me. It's just not me, and that's really difficult to come to terms with."

For her, opening up the conversation is vital to ensure women with endometriosis can live their best possible lives with the condition – a factor Standard Life is committed to support by bringing awareness of endometriosis firmly into the mainstream. A core element of that conversation will focus on the current extent of diagnosis time and the challenges around identifying the illness at an early stage. "The fact it takes an average of seven and a half years to get a diagnosis just shows that endometriosis has been in the shadows for far too long," Katy says.

"It's so wonderful to see more people opening up a discussion, and I'm so impressed with Standard Life for putting this on the agenda. The workplace has to be a more open environment, where companies recognise invisible illnesses like endometriosis and work with their employees on things like wellness days and flexible or home-working policies. It's just about normalising that conversation, and keeping the lines of communication open," she adds.

"Imagine a workplace where you knew you could open up about your mental health, your physical health, your menstrual health – anything – without fear of losing your job. How much better and more efficient would your workforce be?"

Standard Life has partnered with Endometriosis UK to champion the needs of women living and working with the condition. The first-of-its-kind partnership will form part of a broader campaign, in collaboration with other specialist partners, to champion those affected by invisible illnesses in the UK, and highlight the challenges of living and working with a chronic healrh problem.

Katy Johnston is a student and journalist living with endometriosis