What causes tremors besides Parkinson's disease?

One cause is neuronal irritability which is affected by low blood sugars (hypoglycemia). You have a counter-neurotransmitter that then comes in to raise the blood sugars and this is epinephrine (adrenaline).

Other symptoms are the following:

1. Anxiety

2. Sweating

3. Tremors

4. High pulse rate

5. Weakness

6. Mental confusion

7. Headaches

8. Depression or lethargy