These include feeling very thirsty, peeing 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, or blurred vision.
“Detecting problems early can mean they’re easier to treat. If problems aren’t treated, they may lead to damage that’s harder, or even impossible, to repair,” the health body says.
It advises that even if you brush and floss routinely “it’s still best to visit your dentist at regular intervals”.
The NHS says that many more people have blood sugar levels above the normal range, but not high enough to be diagnosed as having diabetes.