Things You Might Not Know About Excessive Sweating

Hyperhidrosis Facts and Figures

Sure, we all sweat! But how much do you know about that sweat? Here is a quick list of facts that are dripping with information about excessive sweating (hyperhidrosis).


Nearly 1 in 20 people in the US suffers from hyperhidrosis

Who has hyperhidrosis?

  • Nearly 1 in 20 people in the US suffers from hyperhidrosis. That’s more than 15 million people
  • Hyperhidrosis impacts men and women equally
  • Hyperhidrosis often begins in childhood or adolescence and most commonly affects younger sufferers, ages 18-39 years

What impact can hyperhidrosis have on people’s lives?

  • Hyperhidrosis can significantly impair quality of life, causing limitations in work and social relationships, sports and leisure activities, and can negatively affect emotional health
  • In a recent study of 8160 people, of the 393 people who reported having hyperhidrosis, 85% found their excessive sweating to be embarrassing and 71% said that it makes them anxious

In a recent study of 393 people with hyperhidrosis, 85% found excessive sweating to be embarrassing


People with hyperhidrosis produce 4-5X more sweat

How does hyperhidrosis affect the body physically?

  • People with hyperhidrosis produce 4 to 5 times more sweat than average to deal with heat or stress
  • 65% of people with excessive sweating suffer from underarm (axillary) sweating, which occurs either on its own or in combination with other body areas

There are 2 main types of hyperhidrosis


When you sweat excessively without any other physical reason it is called primary hyperhidrosis, which:

  • Is not caused by another medical condition or medicine
  • Often begins in childhood or adolescence
  • Usually affects body parts such as the axillae (underarms), palms, soles, and face. Often more than one body part is involved
  • Does not usually happen while sleeping
  • Sometimes runs in families. If you have a parent with it, you have about a 25% chance of developing it, too

When you sweat excessively and it is a symptom of another medical condition, or a side effect of a medication, it is called secondary hyperhidrosis, which:

  • Can be focal (limited to certain body parts) but is more commonly generalized (involves sweating that occurs over the whole body)
  • Can happen during both waking and sleeping hours

Only a healthcare professional can diagnose you with hyperhidrosis.

  • Nearly half (49%) of people with hyperhidrosis suffer in silence for years before speaking to a doctor about it
  • If you think you might have primary hyperhidrosis, be sure to talk to your dermatologist...and to explore this site for more information
  • If you think you may have secondary hyperhidrosis, talk to your doctor right away. Treating the main illness usually helps to stop it

In the last day, have you experienced excessive underarm sweating?

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How can you tell if your sweat might be due to a medical condition? Take a self-assessment questionnaire to learn more.

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