Direct from the ADA website.
Part of living with diabetes is learning to cope with some of the problems that go along with having the disease. Hypoglycemia or low blood glucose (sugar) is one of those problems. Hypoglycemia happens from time to time to everyone who has diabetes.
Hypoglycemia, sometimes called an insulin reaction, can happen even during those times when you're doing all you can to manage your diabetes. So, although many times you can't prevent it from happening, hypoglycemia (low blood glucose) can be treated before it gets worse. For this reason, it's important to know what hypoglycemia is, what symptoms of hypoglycemia are, and how to treat hypoglycemia.
The symptoms of hypoglycemia include:
* Shakiness
* Dizziness
* Sweating
* Hunger
* Headache
* Pale skin color
* Sudden moodiness or behavior changes, such as crying for no apparent reason
* Clumsy or jerky movements
* Seizure
* Difficulty paying attention, or confusion
* Tingling sensations around the mouth
More info
here.
This can happen to T1 or T2.