Can eating too much sweets and the heat cause me to feel dizzy and light headed?

Lightheadedness: Heat exhaustion and dehydration can certainly lead to lightheadedness. Eating sweats may affect pre-diabetics and diabetics with compensatory hypoglycemia after ingestion which causes lightheadedness. Make sure your heartrate isn't irreglar or too fast. Count beats at carotid artery of neck for 6 seconds and multiply by 10. Should be less than 120, unless exercising. Hydrate well.