DEAR DR. GOTT: My son is 60-plus years old and has been reasonably healthy. He has been hospitalized a couple of times for pneumonia. Unfortunately, he still smokes.

Over the past few years, he has developed a visible constant shaking of his body, particularly noticeable in his arms and hands, even when he is eating. He is married and has no children. Seeing him during the holidays, my husband (his stepdad) and I were shocked at his appearance. He has always been a handsome man. Now, apart from the frightening, continuous shaking, he has a sick, unhealthy color, with his face blotchy and gray. His eyes are rather sullen and baglike. He coughs occasionally, sometimes almost choking.
When asked, his wife said he has been to the doctor, had a few preliminary tests and is fine. “They could find nothing wrong with him.”
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