It can be controlled by taking medication to reduce glucose to normal levels and also by making lifestyle and dietary changes.
Ms Abbott was criticised for her performance during the electoral campaign, in which she stumbled several times during interviews and appeared unable to give detailed answers to questions.
In one interview with LBC Radio, she mistakenly said plans to boost police numbers by 10,000 would expense 300,000. It led to a onslaught of criticism from the Conservatives who said she could not “add up”.
She pulled out of an interview on BBC’s Woman’s Hour with merely a few minutes’ notice amid unconfirmed reports that some within the party leadership had lost confidence in her.
Just 48 hours before polling day, Labour said Ms Abbott was taking a period of sick leave and would be replaced “indefinitely” by Lyn Brown.
Ms Abbott, a key ally and pal of Jeremy Corbyn, said she was badly affected after facing six or seven interviews in a row without eating enough food – vital to managing blood sugar levels.
“During the election campaign, everything ran crazy – and the diabetes was out of control, the blood sugar was out of control, ” she said.
Ms Abbott, who was re-elected as MP for Hackney North and Stoke Newington with a majority of more than 30,000, accused her political opponents of mounting a “vicious” campaign against her.
She told the newspaper she was disappointed a female prime minister had singled her out as their own nationals target.
The Guardian tells a Conservative source “angrily rejected” Ms Abbott’s accusations and said it was “legitimate in a campaign to point out weaknesses in the opposition’s front bench”
The source wished Ms Abbott well with her health, adding: “No-one knows more about the difficulties of diabetes than the prime minister.”
Theresa May revealed in 2013 that she had type 1 diabetes. During the election campaign she said she managed it by injecting herself with insulin six times a day.
Type 2 Diabetes
Diabetes is a condition that induces a person’s blood sugar to become too high.
Type 1 Diabetes can develop at any age, but often begins in childhood. It is not related to diet or lifestyle
Type 2 is far more common than character 1, but is still rare in childhood. It is usually seen in adults and is often links with obesity
Type 2 diabetes can lead to serious complications, including kidney failure, blindness and heart disease
It’s the most common cause of eyesight loss and blindness in people of working age
Type 2 diabetes is also responsible for most cases of kidney failure and lower extremity amputation, other than accidents
People with type 2 diabetes are up to five times more likely to have cardiovascular disease, such as a stroke, than those without diabetes
Symptoms include feeling very thirsty; passing urine more often than usual, particularly at night; feeling very tired; weight loss and loss of muscle majority