1, washing your hair too often.
Don't wash your hair too often, because there is a layer of self-protection substance on the scalp and hair surface. If you wash your hair every day, it will destroy the protective layer and the scalp will naturally dry and itch. Generally speaking, it is most appropriate to wash once or twice a week when sweating is not serious and hair is not easy to get dirty.
2. Shampoo is not suitable
It is not advisable to use strong alkaline soap when washing hair, because alkaline soap will stimulate keratinization of scalp epithelial cells and produce dandruff. You can wash your hair with sulfur soap or shampoo. Try to pay attention when washing your hair. First, put the shampoo on your hands and knead it until it bubbles, then apply the foam to your hair. This will be much better.
The water temperature is too high
Scalp is sensitive, too cold or too hot water will cause some irritation or damage to the scalp, which will only make you produce more dandruff to a certain extent. When washing your hair, the water temperature should not be overheated, otherwise it will easily damage the oil on the scalp and hair, make the water lose, and become dry and itchy.
4, not washed clean
Be sure to wash the shampoo when washing, otherwise the shampoo left on the scalp will make the scalp itchy and uncomfortable.
5. Eating habits
Eating too much irritating and spicy food, smoking and drinking at ordinary times will make endocrine disorders, leading to the secretion of dirty oil on the scalp.
Step 6 scratch your head with your nails
When washing your hair, you will scratch hard with your nails and scratch hard. I feel very enjoyable and comfortable, but it will easily scratch my scalp and only cause more dandruff.
7, lack of sleep
Lack of sleep will increase scalp oil secretion, increase the chance of hair loss, and more likely affect normal blood circulation, hinder hair follicles from absorbing nutrients, and increase the chance of hair loss. So you should try to have enough rest.
8, contact with the scalp
Exposed to the scorching sun, the collagen under the scalp will break, and the strong sunlight will make the skin fragile and affect the support of hair roots. You have to make good use of the benefits of sunlight on the scalp and avoid the harm of sunlight on the skin.
9. Rain pollution
Rainwater is mixed with pollutants in the air and is acidic. If it falls on the scalp, it will easily damage the skin of the head if it is not cleaned in time.
Extended data dandruff hazard:
1, scalp is the first element of human beauty and an important standard of health. Having elegant hair is what every beauty lover yearns for. However, hateful hair loss has taken away the youthful brilliance of the past and brought endless troubles to people. Dandruff greatly reduces the beauty and chic of youth. Dandruff and hair loss not only plague people's appearance, but also afflict them mentally and mentally. Inadvertently turn around. Only then did I find that dandruff all over my head and shoulders, or baldness at a young age, was really a great damage to my appearance, a great blow to my self-confidence, and also affected my career choice, marriage and even my future. In today's fierce competition, staying away from dandruff and hair loss is a factor to win in the competition.
2. Dandruff adheres to the scalp surface and falls off a lot. This seemingly small problem often puzzles people's work, life and social life.
3. When dandruff appears, it is often accompanied by symptoms such as scalp inflammation and scalp itching; If proper treatment is not taken, the disease may occur periodically, recurrently or continuously, and in severe cases, it may lead to scalp hair follicle damage and permanent hair loss.
Reference source Baidu Encyclopedia-Dandruff