Eccrine glands are present on almost all skin surfaces except for the nail beds, parts of the genitals and outer ear, and the borders of the lips. There are large concentrations of these glands on the face as well as the palms and soles.
Sweat is predominantly made up of salt and water, along with some organic compounds. You can’t control sweating -- your nerves involuntarily stimulate eccrine gland based on emotional and environmental triggers.
So when you start to sweat in the heat of the summer, now you understand why!
