Glucose in the blood comes from 2 sources. The first is what one eats and the second is from the liver. In diabetes the liver makes too much glucose and it is insulin that helps control it. When it comes to infections , then there are stress hormones like cortisol and adrenaline that tell the liver to make even more glucose, which is why the levels go up in the face of an infection. When a patient presents with high glucose readings during an infection, then it is either because they were an undiagnosed diabetic or pre-diabetic, or has what we call stress hyperglycemia(high glucose levels as a results of the infection, but settles back to normal when the infection has cleared). In terms of sorting out which one he has, time will tell, but sometimes if a test called an HbA1c is done at the time, then it can help, as it would normally be raised if he has undiagnosed diabetes for a while beforehand. If he is diabetic then he should see a dietician regarding food choices.
The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal
advice. Health24 and the expert accept no responsibility or liability for any damage or personal harm you may suffer resulting from making use of this content.