The best way to deal with this type of imbalance is to consume the foods that lower blood glucose levels. Some vegetables need to be treated with caution as they are very high in starch. But it is a nutritional problem and it can lead to serious disruptions in brain chemistry, stress hormone regulation, energy and metabolism.
When dehydrated you need to take special care to stay away from coffee and soda pops or other liquids containing caffeine and sugar. Symptoms of hypoglycemia are many and varied; the brain symptoms include difficulty thinking clearly, feeling spaced out and dizzy, poor word-finding ability, foggy brain and sometimes even blurred vision or tinnitus. What was just said pretty much applies to cookies and cakes in general. This includes white flour, white rice, and other refined and polished grains.