Do you often lose your hair?
Posted by hw on November 21st, 2019
Recently, the topic of hair loss after 90s has been hotly debated on the Internet, reflecting a status quo. More and more people are suffering from hair loss problems. Whether it is a man who is getting sparsely on the head or a woman who is combing his hair, he will involuntarily I think, why is hair loss so powerful, do you want to buy some anti-hair loss products?
Why are we losing hair?
Before figuring out this problem, let's take a look at the growth and shedding of hair. There are 10 to 150,000 hair follicles in the human scalp, which are present at birth. Each hair follicle can grow a hair. The hair follicle growth is carried out in a periodic manner, including three stages:
Growth period: lasts 2 to 6 years, the duration of this stage determines the length of the hair.
Degenerative period: lasts for 2 to 3 weeks, the lower part of the hair follicles retreats and the hair stops growing.
Resting period: lasts from 2 to 3 months, and the hair in the rest period is characterized by a stick-like hair, which is in a state of being detached from the hair follicle. At the end of the rest period, the hair shaft falls off and then enters the next hair growth cycle.
In the normal scalp, 80% to 90% of the hair follicles are in the growth phase, 5% to 10% are in the rest period, and 1% to 3% are in the degenerative period. Up to 100 hairs are detached from the scalp every day, and about the same number of hair follicles enter the growth phase.
If less than 100 hairs are shed each day, it is normal physiological hair loss, which is the normal metabolism of our hair. When it is outside this range, the newly grown hair will not be able to withstand the amount of hair loss, and the total amount of hair will be reduced. It may be pathological hair loss, which will cause us different degrees of trouble. There are two main types of pathological alopecia:
Androgenetic alopecia (AGA) is the most common type of pathological alopecia. The mechanism is due to the miniaturization of hair follicles caused by hormones in the hair follicles sensitive to androgens (mainly dihydrotestosterone), shortening the growth period, leading to normal hair eventually. Replaced by a short, thin mane. This phenomenon has a strong genetic predisposition and can be influenced by both parents.
Another common type of pathological alopecia is "alopecia areata", commonly known as ghost shaving. When the body's immune system is disordered and begins to attack the scalp hair follicles and destroy the normal growth cycle of the hair, alopecia areata may occur, usually in the form of a single or multiple rounded patchy hair loss area.
In addition to the above two common types, there are many other types of hair loss caused by other causes, including rest period hair loss, hair loss caused by chemotherapy drugs, inflammatory diseases that destroy hair follicles such as folliculitis, forehead fibrotic alopecia, etc. .
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About the Authorhw
Joined: June 6th, 2019
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