High blood sugar can make your mouth dry, make you feel thirsty, give you blurred vision and make you need to pee often. This is known as hyperglycemia.
When we think of those who have high blood sugar, we tend to think of people with diabetes, as they often have to monitor their levels and sometimes undergo insulin treatment. But actually everybody can have blood sugar spikes, and many of us do without even realising. These occur when a simple sugar called glucose builds up in the blood.
