Good evening doctor, my father's age is 66 years. He is having no smoking and drinking habits. But he is having writers cramps disease. Unable to hold pen .While drinking tea or coffee hand shakes, while shaving also hand shakes. Now the problem is 10 days back he suffered from fever .After giving paracetamol its gone. Last night he felt that his left hand fingers had trembled involuntary for few seconds at midnight during his sleep. He noticed it and told to us. He is having no pain at that time. Is it any problem or a sign of stroke or any thing. Can any one please suggest a solution. What to do.