Hello,
Are the tremors present at rest or do they
occur when you are moving your hand and disappear at rest? Sometimes postural tremors may occur when you are holding your hand or affected body part in a particular position for a period of time.
Causes of headache and tremors are stress, anxiety and panic attacks,too much consumption of caffeine or alcohol,low blood sugar(hypoglycemia),autoimmune disease like multiple sclerosis,thyroid disorders,cerebellar dysfunction and liver disease.