The most important takeaway from this post is to always apply antiperspirant to dry skin. I know this can be challenging, particularly for someone with severe hyperhidrosis, but applying to wet skin may lead to irritation and discomfort. Consider using a dry towel or a hair dryer on a cool setting before applying antiperspirant to the affected area(s).

The second most important takeaway from this post is to always apply antiperspirant at bedtime. For most hyperhidrosis sufferers, sweating subsides overnight, so applying at night results in BOTH better effectiveness and less irritation.

Applying antiperspirant again in the morning (to dry skin) can be considered, but one application of antiperspirant should last at least 24 hours.

Avoid applying antiperspirants to broken or irritated skin. Also, use caution when applying to skin that has been recently shaved.

Remember that antiperspirants are the treatment of choice for almost all areas where you may sweat, but they should only be applied externally. Do not apply to any mucous membranes (for example, eyes, inside of your nose, mouth, genitals, anus), as these areas are easily irritated.

When used properly (to dry skin, at bedtime, to intact skin), antiperspirants are an effective treatment for almost all areas of sweating.