Medline Plus: Sweating MedLine Plus: Sweating 2 to 4 million sweat glands Sweating perspiration National Institutes of Health; Sweating; May 2009 MedLinePlus.com: Sweating (MedLinePlus.com: Sudor) Medline Plus: Sweating National Institutes of Health; Sweating; May 2009 two to four million sweat glands National Institutes of Health National Institutes of Health: Sweating National Institutes of Health: Sweating