I had the worst sweaty hands & feet growing up. It continued until I had my electrical heart problems corrected. So just make sure no other causes for the excess sweat.
My daughter suffers with this condition also. She can't wear flip flops, or certain sandals due to her feet sweating and causing her to slip out of the shoes and fall, or twist an ankle. I took her to several physicians and they recommended Sure Dri. It's an over the counter product that will help keep your hands and feet dry. She tried this and hated it! I have the same condition, only in my case, it's my entire body, but especially my upper body.
They can now inject botox into the areas that are a problem. However, this is only a temporary solution and is very painful due to multiple sticks at the injection sites. This has to be repeated every few months or so. Even with the surgery, the sweating will start some place else. Example: If your hands and feet sweat profusely and you stop that, it could start pouring from your face or underarms.
As a child, my hands and feet sweat excessively. I even had tiny blisters on my hands from the sweat glands backing up. My parents took me to the doctor who just stated the obvious. My hands and feet sweat way too much. Technology has improved to the point that the problem can be corrected surgically. I would recommend against it. In my situation, I outgrew it. By the time I was in my early 20's, it was gone. I would have suffered through a surgery that time corrected. My best to your child.
Be sure to talk with her pediatrician about that. They will know more about that. The only other reliable source is if you can find a support group, linked to that conditions organization. For example, search for hyperhidrosis organization. Best of luck to you and your child!
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