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Young women are the highest risk group in England for mental health problems, according to new data from NHS Digital.

One in five women reported a common mental disorder such as anxiety and depression in 2014, compared with one in eight men, according to the study of mental health and wellbeing.

Young women also have high rates of self-harm, and post-traumatic stress and bipolar disorders.

Mental health charities said the figures showed "nothing had improved".

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One in six adults in England has a common mental disorder (CMD), according to the survey.

The National Study of Health and Wellbeing has been carried out every seven years since 1993. This latest report is based on research on 7,500 members of the public - just over 300 of them were women aged 16-24.

The 2014 data showed the gender gap in mental illness had become most pronounced in young people, and had increased since the first survey.

In 1993, 19% of 16-to-24-year-old women surveyed reported symptoms of CMD compared with 8% of men of the same age.

In a snapshot, 26% of women aged 16-24 reported symptoms of common mental disorders in one week, compared to 9% of men in the same age group.

More women in every age group reported symptoms in one week compared with men of the same age.

Where to get help

Rethink Mental Illness advice line 0300 5000 927 (Monday to Friday 09:30-16:00; local rate)

Mind Infoline 0300 123 3393 (Monday to Friday 09:00-18:00; local rate)

Samaritans 116 123 (Open 24/7; free)

What does the study say?

In 2014, women aged 16-24 were three times as likely to report symptoms of anxiety and depression as than men - 26% compared to 9%.

Post-traumatic stress disorder was seen in 12.6% of women of that age compared with 3.6% of men.

CMD rates have steadily increased in women and remained largely stable in men, since the last survey in 2007.

Women were also more likely than men to report severe symptoms - 10% of women compared with 6% of men.

The proportion of the population reporting self-harming was 6%, up from 4% in 2007 and 2% in 2000. Researchers suggest this could be due to increased reporting.

In 2014, one in five 16-to-24-year-old women (25.7%) reported having self-harmed at some point.

That is about twice the rate for men in this age group (9.7%) and women aged 25-34 (13.2%).

The report's authors say this is the first cohort to come of age in the context of social media, and call for more research about its impact.

Young women and mental health in England 26% of young women (16-24) reported a common mental health disorder (9% of young men) 26% of young women have self-harmed (10% of young men)

13% of young women screened positive for post-traumatic stress disorder (4% of young men)

4% of young women screened positive for bipolar disorder (3% of young men) SPL

One in three adults with anxiety or depression was accessing mental health treatment in 2014, up from one in four in 2007.

The study found medication was the most common form of treatment for all conditions, being taken by 10% of those interviewed, with 3% receiving psychological therapy.

The data showed people who were white British, female, or aged 35 to 54 were more likely to receive treatment.

'The facade shattered'

Image copyright Sarah Mitchell Image caption Sarah Mitchell had a breakdown when she was a recruitment consultant

Sarah Mitchell was 23 when she suffered a breakdown while working as a recruitment consultant.

Up until then she says she was known as "happy Sarah", a person who would always be smiling and baking cakes, until one day the "facade shattered".

With hindsight, Sarah said she had probably experienced depression as a teenager and had not properly come to terms with the death of her grandmother, whom she was close to.

Sarah said she had been used to bottling up her feelings before she experienced the breakdown - something she described as a "completely surreal experience".

"I got to work and checked my computer and then my chest started heaving. I thought there was something physically wrong - I thought I had heart problems," she said.

A colleague told Sarah to go the doctor, where she was diagnosed as having suffered a panic attack. She was later diagnosed with depression and then bipolar disorder.

Sarah, from Essex, was off sick from work with depression for six months but in the end decided not to return and instead focused on getting better.

After a period of volunteering, Sarah pursued her interest of writing to become a freelance copywriter.

Now 30, Sarah does mindfulness meditation and focuses on eating well and exercising to keep herself mentally healthy.

"It's not a failure to be struggling. Everyone has different breaking points."

What do the experts say?

Stephen Buckley, head of information at the mental health charity Mind, said: "Young people are coming of working age in times of economic uncertainty. They're more likely to experience issues associated with debt, unemployment and poverty, and they are up against increasing social and environmental pressures, all of which affect well-being.

He said there had been a "surge" in the use of social media since the last survey in 2009.

"It can help people feel less isolated, particularly those who struggle to make and maintain relationships or who find it difficult to leave their homes.

"But it also comes with some risks. Its instantaneous and anonymous nature means it's easy for people to make hasty and sometimes ill-advised comments that can negatively affect other people's mental health."

Marjorie Wallace, chief executive of the mental health charity Sane, said the report painted a "disturbing picture".

"Perhaps the most shocking finding is the escalation in both the extent and severity of self-harm, particularly amongst young women. At Sane, the number of calls from people who are self-harming or experiencing suicidal thoughts has almost trebled in the last 10 years."

Elizabeth Scowcroft from The Samaritans said the rise in people feeling suicidal, attempting to take their own life and self-harming was "alarming".

"The fact that half of adults who attempted suicide did not reach out for help afterwards is particularly concerning.

"The increase in self-harm is worrying because it's the biggest indicator that someone may go on to take their own life. It is critical that we learn more about the links between self-harm and suicide and that anyone who self-harms can receive the support they need."

Health Secretary Jeremy Hunt said: "We want to make sure that everyone, regardless of gender, age or background, gets the mental health treatment they need."

'Queues trigger anxiety'

Image copyright Mikaela Korth

Mikaela Korth, 20, is doing an apprenticeship in business administration and working in a bar in her spare time, which she says adds up to 50 hours a week.

She said in the past year her anxiety had grown to the point where the "smallest things" - such as waiting in a queue - could trigger strong feelings of anxiety and even panic attacks.

Her GP diagnosed her as suffering from anxiety about three weeks ago, but she says she has been told it could take up to 18 weeks to receive the cognitive behavioural therapy treatment her GP had prescribed her.

Mikaela, from Rotherham, said she felt there were not enough doctors and the minimum wage needed to be increased.

"I don't get much money and the cost of food and other things keeps going up. It is a constant struggle."