The International Hyperhidrosis Society (IHHS) reports that hyperhidrosis, or excessive sweating, affects an estimated 3 percent of the world's population. There are various causes of hyperhidrosis, and, fortunately, there are treatments tailored to each one.

How Sweat Works

Sweat is the body's natural cooling system. Every individual has between 2 and 4 million sweat glands in their body, many of which are concentrated in the soles of the feet, palms, face and underarms. These sweat glands secrete a clear fluid that evaporates and cools the body. Sweat glands are controlled by nerves, which respond to a variety of stimuli, such as temperature or activity.

Primary Focal Hyperhidrosis

Primary focal hyperhidrosis is a medical condition in which a particular area of the body experiences excessive sweat, such as the underarms. Sweat glands in this part of the body act as if they are always turned "on" regardless of whether stimuli are triggering the nerves controlling the glands.

Secondary Generalized Hyperhidrosis

Secondary generalized hyperhidrosis refers to excessive sweating over a large area of the body, which can include the underarms. The sweating is caused by an underlying condition, such as diabetes, reaction to a medication or an infection.

Genetics

Primary focal hyperhidrosis has been shown to be hereditary in 25 to 50 percent of all cases, according to the Mayo Clinic. The IHHS claims that studies show heredity to be a factor in as many as 65 percent of the cases. It is difficult to know for sure what the percentage is, because many people who suffer from this condition either don't talk about it or go to lengths to hide it. Regardless, genetics have been proven to be a significant factor in this condition.

Treatments

Primary focal hyperhidrosis must be treated with medicated antiperspirant, oral medication, Botox or surgery. These treatments focus on turning off or blocking sweat glands in the problem area. Secondary generalized hyperhidrosis can only be cured by treating the underlying issue that is the cause of the excessive sweat.

Source:

International Hyperhydrosis Society: About Hyperhidrosis

Mayo Clinic: Hyperhidrosis

More Information:

International Hyperhydrosis Society: What Would Dry Mean to You?