The data says to you

The basic structure of the scalp and facial skin is the same, consisting of the epidermis, dermis and subcutaneous tissue.

Schematic diagram of skin tissue structure

There are several special places in the scalp and facial skin:

Feature 1: The thickness of the scalp is about 1.476 mm, the thickness of the skin on the cheeks is about 1.533 mm, and the thickness of the skin on the nose is about 2.040 mm. This means that the scalp is thinner than most of the skin on the face.

Feature 2: The sebaceous gland density on the scalp is about 144-192/cm2, about 52-79/cm2 on the forehead, and about 42-78/cm2 on the cheek. That is to say, even the number of sebaceous glands in the scalp is twice as high as that on the forehead that is most likely to be oily on the face.

Characteristic 3: The amount of sebum secreted on the surface of the scalp reached 288 μg/cm 2 in 12 hours, while the amount of sebum on the forehead was only 144 μg / cm 2 .

In short, the scalp is thinner and the sebum secretion is more intense than that of the facial skin. Because of the occlusion of the hair, the scalp is more challenging to clean than the face.

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Similar to facial skin health, scalp health also has a water-oil balance problem.

For example, the head is often caused by too little sebum secretion in the scalp, or the scalp stratum corneum is destroyed, and the scalp's ability to retain water is weakened. Dryness can cause scaling and itching, just like peeling and drying the facial skin. The difference is that if the face is peeled, people will pay attention to it, and will use various Fangli to replenish water to alleviate the phenomenon of peeling. It can be itchy, people will catch it, not only the symptoms can not be improved, if you leave a wound after scratching, it is easy to get infected.

The opposite of the head is the head oil, which is usually caused by excess sebum secretion in the scalp. Head oil is prone to dandruff, because the fungus that causes dandruff prefers the oily scalp. The head oil is also prone to odor and makes the hair sticky and flat.

The scalp also needs care

The scalp also needs care

People wash their faces twice a day, but they don't necessarily wash their hair every day. According to a survey, the average frequency of shampooing in the global population is 3-5.6 times per week. The average Russian shampoo frequency is the lowest (2.82 times/week), the Mexican is the highest (5.60/week), and the Chinese are moderately low (3.31/week). The concept of facial care is deeply rooted in people's minds, and products designed for facial health are also dazzling, and research and products on scalp health are hard to see.

It is generally believed that facial skin begins to age from around 25 years old, while the scalp begins to decline on the 40th. By "retirement", the scalp's ability to move began to decline, the number of hair follicles dropped to 1/4 of birth, hair density decreased, and hair growth rate also decreased. If you don't care for your scalp, its aging speed will increase.

Healthy scalp is not itchy, non-greasy, not dry, and the scalp sebum is moderately secreted. Like the facial skin, the epidermal cells of the scalp are also produced from the basal layer in a 28-day cycle, moving outward, and finally becoming dandruff. There are also examples of various scalp problems below, but many people have headaches.

How to care for the scalp

First, develop good hygiene habits. Do not over-perform, dye hair, do not scratch the scalp. Massage the scalp during bathing to improve blood circulation.

Second, relax the spirit and balance the mindset. If you are too tired, or excessive anxiety, it will cause endocrine disorders, metabolic disorders and decreased resistance, which will in turn lead to a series of scalp problems.

Finally, it is necessary to have a healthy diet and a regular life. The whole state of health of the human body is the most important. Otherwise, it will not be able to repair more than one part, and it will not save the fate of the tofu residue project.