What is the black hair on the face?

1. What is black hair on the face?

The black hair on the face is the beard of the human body.

Beards are caused by the influence of testosterone during human development. Men have higher testosterone levels, so men’s beard growth is more obvious than that of women.

2. The role of beards

Beards play an important role in human body cognition and transmission of information.

On the one hand, beards can play a protective role. For example, in men's fights, beards can protect the face; in cold weather, beards can keep warm.

On the other hand, beards are also an important part of people's emotional expression. The growth of beard can reveal a person's emotional changes, such as anger, fatigue, anxiety, etc.

3. How to care for beards on your face

Caring for beards can help them grow healthily, prevent them from splitting and falling off, and make your beards more beautiful.

The first thing to pay attention to is to keep it clean, which can be cleaned with a special beard shampoo or ordinary shampoo. Secondly, to keep it properly moisturized, you can use conditioner or special ointment to moisturize your beard. Finally, trim your beard and trim it regularly to length and shape.

4. The evolution of human beards

The evolution of human beards has gone through many evolutions. Due to changes in factors such as the environment, food, and hormone levels within the human body, the appearance of beards has changed. Growth is constantly changing.

The beards of early humans grew sparsely, mainly to protect the face from damage. As humans evolved into modern humans, beards grew thicker and became an important part of expression and social communication.