After the weather gets hot, why does the armpit smell?

Environmental factors: There are two kinds of sweat glands in human body, one is exocrine sweat gland, also called eccrine sweat gland (eccrine sweat gland translation: mainly distributed in armpit, areola and umbilical fossa). Its composition is similar to that of plasma, and it contains electrolyte besides water. )。 The other is apocrine gland, also called apocrine gland. Apocrine glands are distributed all over the human body. Because more than 99% of the sweat it secretes is water, it is generally colorless and tasteless. When the human body sweats a lot and fails to clean it in time, the sweat will penetrate into the stratum corneum of the skin, so that protein and lipids will be decomposed by bacteria parasitic on the skin surface, resulting in peculiar smell.

Thick hair: Experts say that people with thick hair are relatively rich in sweat glands, especially those with dense sweat glands under their armpits.

Living habits: Personal hygiene is closely related to body odor. Bad living habits often lead to underarm odor. There are many places in the human body that are not conducive to cleaning, such as under the breast, groin, armpit and navel, with many wrinkles and more secretions than other parts. Many young men and women like to wear tights, jeans and so on. Cause the skin to cling to the clothes, prevent the secretion from evaporating, and make these local temperatures and humidity high, and some bacteria are here.