Apocrine glands are a type of sweat gland found primarily in areas such as the armpits and groin. They are larger than eccrine glands, the other main type of sweat gland, and are responsible for producing a thicker, milky secretion. This secretion is rich in proteins and lipids, which can lead to body odor when broken down by bacteria on the skin. These glands become active during puberty and are influenced by hormonal changes. Unlike eccrine glands, which help regulate body temperature through sweat, apocrine glands are primarily associated with emotional responses, such as stress or anxiety.