Diabetes mellitus refers to a group of diseases that affect how the body uses blood sugar (glucose). Glucose is an important source of energy for the cells that make up the muscles and tissues. It's also the brain's main source of fuel.

What are 7 signs of diabetes?

There are seven main warning signs of diabetes:

• Needing to go to the toilet a lot, especially at night.
• Feeling thirsty regularly.
• Feeling more tired than usual.
• Losing weight without trying to.
• Itching around your genitals or frequent episodes of thrush.
• Cuts and wounds that take longer than usual to heal.
• Blurred vision.