Diabetes is a lifelong condition that causes a person's blood sugar level to become too high.
There are two main types of diabetes:
type 1 diabetes – where the body's immune system attacks and destroys the cells that produce insulin
type 2 diabetes – where the body doesn't produce enough insulin, or the body's cells don't react to insulin
Type 2 diabetes is far more common than type 1. In the UK, around 90% of all adults with diabetes have type 2.
During pregnancy, some women have such high levels of blood glucose that their body is unable to produce enough insulin to absorb it all. This is known as gestational diabetes.
Pre-diabetes
Many more people have blood sugar levels above the normal range, but not high enough to be diagnosed as having diabetes.
This is sometimes known as pre-diabetes. If your blood sugar level is above the normal range, your risk of developing full-blown diabetes is increased.
It's very important for diabetes to be diagnosed as early as possible because it will get progressively worse if left untreated.
When to see a doctor
Visit your GP as soon as possible if you experience the main symptoms of diabetes, which include:
feeling very thirsty
urinating more frequently than usual, particularly at night
feeling very tired
weight loss and loss of muscle bulk
itching around the penis or vagina, or frequent episodes of thrush
cuts or wounds that heal slowly
blurred vision
Type 1 diabetes can develop quickly over weeks or even days.
Many people have type 2 diabetes for years without realising because the early symptoms tend to be general.
Although there is no cure for dementia at present, if it's diagnosed in the early stages, there are ways you can slow it down and maintain mental function. A diagnosis can help people with dementia get the right treatment and support, and help those close to them to prepare and plan for the future. With treatment and support, many people are able to lead active, fulfilled lives. The symptoms of dementia tend to worsen with time. In the much later stages of dementia, people will be able to do far less for themselves and may lose much of their ability to communicate. Read more about how dementia is diagnosed, or find out more about: Living with dementia Staying independent if you have dementia Looking after a loved one with dementia