What is brown skin called around breast nipple?

Answer 1

The brown skin around the nipple is called the areola. It is a circular area of pigmented skin that surrounds the nipple. The color of the areola can vary from light pink to dark brown, depending on factors such as genetics and hormonal changes. The areola contains small bumps called Montgomery glands, which secrete oil to keep the skin lubricated.

Answer 2

The medical term for the circle of pigmented skin (which isn't necessarily "brown") is "areola" (plural "areolae"). Technically, any differently colored roughly circular patch of skin (for example, a red inflamed area around a wound) can be called an "areola," and if you want to be perfectly clear that you're talking about the one around the nipple you should say areola mammae. However, outside a technical medical journal if you just say "areola" most people will assume that's what you mean.