Does coffee affect hyperhidrosis?
As far as we know normal amounts of coffee cups per day (1-3) should not have any effect on hyperhidrosis. Obviously excessive amounts of coffee, which is a stimulant (heart rate may increase), might have some negative effect with increased sweating in the hands and feet. For some it may also contribute to anxiety for others not so it really depends on the individual.
The best approach with coffee is trial and error. Try it, make observations on how it affects you then decide it you can manage with it.