Squat for a while, stand up, dizzy, black eyes. What's going on?

Squat for a while stand up on dizziness phenomenon, seen in many kinds of diseases. First of all, consider the orthostatic hypotension caused; In addition, there may be hypoglycemia, malnutrition and other reasons caused. You can eat bread candy to alleviate the symptoms of discomfort. If dizziness symptoms are serious, go to the hospital in time to do relevant examination and treatment.