Why does my scalp smell?

There are more and more chemical products nowadays, and we cannot distinguish the good from the bad. For example, there are many types of shampoos we use on the market. Improper selection of shampoo will not only cause an itchy scalp, but also cause severe oil production and odor. When choosing a shampoo, be sure to choose one that does not contain silicone oil. It is also best to choose a mild and non-irritating shampoo. You should also wash your hair and take a bath frequently and pay attention to hygiene.

Origin of the smell

On a normal person's head, there are 144 to 192 sebaceous glands per square centimeter, which is much higher than the skin on the face. The sebum they secrete moisturizes the hair and keeps it shiny and soft. But at the same time, sebum also becomes a culture medium for bacterial growth, and sebum oxidation will emit a rancid smell and greasy odor.

There are also a large number of small sweat glands on the hair. When exercising or feeling nervous, they will secrete a lot of sweat to lower the temperature of the brain. The sweat contains a lot of salt, lactic acid and urea. When you wash your hair with hair lotion after strenuous exercise, you will smell a faint smell of ammonia, which is caused by urea.

Nowadays, environmental pollution is becoming more and more serious, and there are more and more residues from hair styling and other hair cosmetics, which will make the hair emit a special odor and be accompanied by scalp itching.

Studies have found that bad odors can easily cause people to feel irritated and lose patience, which greatly affects work efficiency.

Experts used to tell us that in order to protect the sebum on the hair, it is best to wash your hair every 4 to 5 days. But in reality this is impossible unless you want every colleague to avoid you. The new view is that you should wash your hair once a day. According to a survey conducted by Lreal, a major cosmetics company in the world, as early as 1995, the average frequency of Americans washing their hair has reached 5.3 times a week, and many people wash their hair more than once a day.

Here are the reasons:

1. It is caused by the oxidation of scalp sweat and sebum mixed together.

The scalp has sweat glands that produce sweat and sebaceous glands that secrete sebum. Originally, the mixture of sweat and sebum can keep the skin moisturized and have a barrier effect. However, due to certain factors, their excessive secretion will cause annoying odor and greasy feeling.

2. Caused by bad habits: liking greasy food, smoking frequently, drinking frequently, eating mainly meat, and liking to eat food containing a lot of spices.

3. The scalp and facial skin are connected.

First of all, reviewing daily life is related to the normalization of the scalp environment, so people with the above conditions should make improvements. In addition, people who wash their hair in the morning tend to wash it carelessly or not clean it thoroughly because they don't have time. Also, don’t go out with hair that has not been thoroughly blow-dried, as half-dry hair can easily absorb substances that produce odors.