What diseases can high blood sugar cause?

Hyperglycemia is a symptom of disease. There is usually no primary hyperglycemia, but other diseases lead to hyperglycemia. Diabetes is a common disease, and a typical manifestation of diabetes is hyperglycemia. Of course, there are many other reasons, such as: the amount of exercise is obviously reduced, and insulin can't play its role effectively. Eating too much, especially sweets or sugary drinks, obesity, emotional or mental stress, drinking alcohol or taking certain drugs. Generally speaking, if the cause can be eliminated in time, hyperglycemia can be eliminated, and if you have eaten polysaccharide food, you can recover after reducing its intake. However, hyperglycemia caused by diabetes is difficult to treat.