Hair grows by the division and proliferation of dermal papilla cells in the hair bulb, which is generally called active period. From division and proliferation, gradually inactive, leading to aging. Generally speaking, this period is called degeneration period (the hair that has completed its historical mission will fall off by itself soon after entering dormancy period). When your hair is aging, don't pull it out by hand. After three or four months, the aging hair will fall off on its own. After the old hair is taken off, the nipple will start to move again, and new hair will gradually come out. We call the time from hair regeneration to aging hair cycle, which is generally three.
In a healthy state, hair can grow about 1 cm in a month, but the growth rate of hair is not absolutely constant, and it is also affected by season and age. Hair grows fast in spring and summer and slowly in autumn and winter.
Extended data:
Hair physiology
For stagnant hair, normal people can lose 70~ 100 hairs every day and regenerate the same amount of hair at the same time. The length of hair in different parts is related to the length of growth cycle. The growth cycle of eyebrows and eyelashes is only 2 months, so it is shorter. Hair growth is influenced by many factors such as heredity, health, nutrition and hormone level.
Hair care editing simple care
1. Shampoo and hair care. When shampooing, choose good quality (low alkalinity) shampoo, and then use conditioner for maintenance, so as to keep the hair soft, loose and shiny, and add a sense of firmness to the hair.
2. Bake oil regularly. It's best to bake your hair with oil every other month. When baking your hair, apply the baking ointment evenly to your hair to keep it loose and natural.
3. Separation of dyeing and perm. It is best not to do perm and hair dyeing together, because both perm and hair dyeing are rich in more chemical components, and the two layers of damage are more harmful to hair. In the case of not dyeing hair, pour the hair dye on the hair and gently rub it with your hands. Don't comb your hair repeatedly.
4. Time distance. If you are not satisfied with the new perm, someone will re-perm it or ask a stylist to help her recover. As we all know, this will do great harm to her hair. If you really want to do it again, it is best to have two perms at least half a month apart; For those who have a perm for the first time, the perm time should be shortened as much as possible, preferably more than half a year after the second perm.
Correct combing
Combing one's hair is one of the indispensable daily trims to keep hairdressing. Combing hair can remove floating skin and dirt from hair, stimulate scalp, promote blood circulation in the head, prevent white hair, yellow hair and hair loss caused by malnutrition, and make hair soft and shiny; At the same time, combing hair can also eliminate head swelling and numbness caused by excessive brain use.
Pay attention to cleaning the comb when combing your hair. Combing your hair will only make the dirt on your hair move. If you put the comb teeth in the nylon stockings and comb them back and forth for more than ten times, you will find dirt adsorbed on the nylon wire, which can not only comb off the dirt, but also protect the cleanliness of the comb.
Wash it with clean water and a soft brush, dry it gently with a towel immediately after washing, and then put it in the shade to dry naturally. If you find that the comb teeth are not straight, you should change them.
References:
Baidu encyclopedia-hair