High blood sugar or hyperglycemia occurs when a diabetic has too much sugar in their bloodstream – this is considered to be when blood glucose levels are higher than 10 mmol/L.

Ben goes through how to bring your blood sugar levels down if you have high blood glucose.

Read more on hyperglycemia: http://www.diabetes.co.uk/Diabetes-and-Hyperglycaemia.html

High blood sugar symptoms: http://www.diabetes.co.uk/high-low-blood-sugar-symptoms.html