Name hair, also known as vellus hair, is a fine, soft hair that covers most of the human body. It is typically light in color and barely visible, but it can become more noticeable in certain areas, such as the face, arms, and legs. Name hair is an important part of the human body's cooling system, as it helps to evaporate sweat and keep the skin cool. It also plays a role in sensing touch and protecting the skin from the sun's harmful UV rays.
Name hair is present on the body from birth, but it becomes more visible during puberty due to the increase in hormone levels. In some people, name hair can become thicker and darker, especially in areas such as the underarms and groin. This is perfectly normal and is not a sign of any underlying health condition.