Rare disorder. Symptoms include nervousness, sweating, hunger, anxiety, blurred vision, fatigue, fast heart rate, etc. -- however unless you have diabetes and are on Insulin or other medication, have renal or liver disease, cancer or prior stomach surgery -- then true hypoglycemia never occurs in human beings. If it a very frequently and incorrectly made diagnosis.
Yes. If you have symptoms of hypoglycemia, the best way to prevent them is to eat regular small amounts, and don't go for a long period without eating. This can usually be accomplished with an late afternoon and a bedtime snack, along with your meals.