Causes

Sweating and body odor are caused by sweat glands in your body. The two main types of sweat glands are eccrine glands and apocrine glands. Eccrine glands occur over most of your body and open directly onto the surface of the skin. When your body temperature rises, these glands release fluids that cool your body as they evaporate.

Apocrine glands are found in areas where you have hair, such as your armpits and groin. These glands release a milky fluid when you're stressed. This fluid is odorless until it combines with bacteria on your skin.