What is the black "mud" in the bath?

I'm sure many people will think? Mud? It's dust and dirt! However, this is not just dust, it includes: dander, grease, sweat and dust. Through the metabolism of the body, some metabolic dander, grease and sweat of the body will attach to the skin surface, plus dust in the air. So there will be a gray stripe when you wipe it! The reason why bathing can always wipe off mud is because the body is metabolizing normally every day, so don't worry.

The skin can secrete nearly 200 grams of oil a week. If there is too much oil secretion, pores will be blocked. Therefore, this sebum exists in the substance that we wipe off in the bath, but we can't wipe off all the oil forcibly, otherwise the skin will not be protected by the sebum layer.

In addition to sebaceous glands, there is a layer of basal cells deep in the skin. With the development of human metabolic function, new keratinocytes are constantly differentiated, so the old cuticle will be slowly pushed to the skin surface and naturally fall off. This is the dandruff we often see on clothes or bodies. Some dandruff will be wiped off in the bath and form a turbid substance with sebum.

Some dust will reach the skin surface through clothes, attach to the sebum layer, accumulate over time, and form muddy dirt with dander sebum. That's why we want to take a bath. We need to remove excess dandruff, grease and dust from the skin to keep it clean.

Different people are different because of many factors, such as physical fitness, environment, activity experience and so on? Mud? Composition. The most common difference is that people with oily skin have more oil. People with dry skin have more dandruff. The surface of human skin is covered with a layer of horny membrane, which is the natural barrier protection layer of skin. It can reduce the evaporation of water in the body, resist the invasion of various harmful microorganisms, and protect the moisture and health of the skin. Of course, if you rub hard at ordinary times, this horny membrane will be destroyed, which will easily lead to skin allergies and lead to red blood. More importantly, it will aggravate dry skin, and the most serious will induce itching. For women, the more friction, the worse the situation. If the protective film is damaged, the skin will get worse and worse. . Therefore, rubbing does not need to be done every day, and rubbing too often will actually damage our skin. This friction will wear away an important physiological defense line of our skin. The skin will be very bad.