Does exercising actually help people who has hyperhidrosis or make it worse?

Hyperhidrosis or excessive sweating can be controlled with Botox or glycopyrrolate. Multiple areas may require nervous system surgical treatment. Please see an expert for evaluation. Best, Dr. Emer

I do not believe that exercise helps reduce primary hyperhidrosis.I have read this and I have heard physician and non physician "specialist" talk about this but this, in reality, has no physiologic merit. People with hyperhidrosis sweat at rest, when they are anxius and stressed, watching TV or being at an NFL football game in the middle of a snow storm. 
Regional treatments may help improve your quality of life.
H Karamanoukian MD FACS
Center for Excessive Sweating, established 1999

Thanks for your question.  It is very interesting and a good thing to consider.  The sweat glands that are active in hyperhidrosis are known as "apocrine" sweat glands, and the sweat glands that help you cool off when exercising are called "eccrine" sweat glands.  The apocrine sweat glands are not involved in exercise or cooling of the body, but cause the "nervous sweat" people get when giving a speech, for example.  You can safely stop the apocrine sweat glands from working by using Botox injections or a more permanent solution such as MiraDry, and those treatments will not affect your exercise at all.  You will be able to cool off and tolerate exercise just fine with treatments in the underarms by your dermatologist, so ask about that at their office.