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Hi and thanks for the query.
Sweating can occur during periods of increased sympathetic activation, which smoking causes. So, yes smoking can cause profuse sweating. So, can a sedentary lifestyle, which when subjected to light exertion can cause the body to over react.
I would suggest that you cut down on your smoking habit and add more exercise to your life style.
That should alleviate the problem.
Eating habits seldom cause profuse sweating, but try to maintain a healthy diet due to its numerous other health benefits.
Let me know if you have further questions.
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Wish you good health.