(1) Exercise. I find a lot of the people with excessive armpit sweating are not exercising enough or at all. So, make sure your exercise isn’t too strenuous and you’re getting adequate sunlight exposure each day. This helps to boost your metabolism and can help decrease excess activity in sweat glands, which will reduce the amount of time the skin is exposed to heat from being activated by infrared radiation from body movement [source: Mayo Clinic].
(2) Make sure you have ample vitamin D levels in your system — it’s best if they’re above 30 ng/ml (nanograms per milliliter). A simple blood test for this is available through a healthcare provider or natural health store [source: Mayo Clinic]. And remember that if someone has been diagnosed with hyperhidrosis, there may be treatments available specifically for them such as Botox injections into affected areas [source: NYLON].