What is high sugar in the blood?

Hello!

I knew someone who had high blood sugar.

High blood sugar or Hyperglycemia, is a serious condition in diabetes. It can affect diabetic people. It is definitely not a good thing, because it can have a major impact on your body. High blood sugar can damage your body's organs and systems, blood vessels, which could then lead to a heart attack or a stroke, and it can damage your vision.