Hair loss is mostly caused by androgen

　　People with thinning hair always have the embarrassment and annoyance of “looking down at the scalp when the wind blows”. On the surface, hair loss is only a matter of face, but the obstacles it brings about in job hunting, social interaction, and love are “top priority” matters, and it may even lead to mental illness if it is not handled properly.
　　Vellus hair is easy to fall
　　off can be divided into hair root and hair shaft from bottom to top. The hair shaft is the part outside the scalp, composed of keratinocytes, which do not consume nutrients. Therefore, the function of hair depends mainly on the hair roots in the scalp. The hair root can be divided into three parts: the lower part of the hair follicle (the hair bulb and the upper part of the hair bulb), the isthmus, and the infundibulum. If the hair is compared to a “plant”, the hair bulb is equivalent to the “root”, and the hair papilla at the bottom of the hair bulb is the “root tip”, which can absorb nutrients from the “soil” – the blood vessels in the skin to help hair grow. If the “root” is in good condition and the blood flow of the “soil” is rich, the “plant” will naturally grow vigorously, and the hair that grows belongs to the “terminal hair” and is not easy to fall off. If the “root” shrinks and the “soil” is poor, the “plant” will gradually become soft. This type of hair belongs to “毳 (cuì) hair”, which is what we often call “cold hair”, and it is easy to fall off.
　　People who are prone to oil
　　are What causes the terminal hair to gradually turn into vellus hair? Among all hair loss types, the most common is androgenetic alopecia, formerly known as “seborrheic alopecia”, accounting for about 85%. If there is too much testosterone in the body, it will be converted into dihydrotestosterone by 5-alpha reductase. This product can make the hair follicles miniaturized, and the hair will naturally become thinner and softer. Unfortunately, 5-alpha reductase is mostly located at the root of hair follicles on the forehead, top of the head, etc., that is to say, it virtually makes these areas “targets” for androgens. In contrast, the hair follicles in the posterior occipital and lateral cephalic regions will not shrink significantly under the influence of androgens.
　　Because of this, hair loss is more common in men. One out of every five adult men in my country has hair loss. It usually shows that the forehead hairline and sideburns move upwards, forming an “M” shaped hairline, and the hair on the front and top is sparse. , yellowing, softening and even baldness. Women also experience androgenetic alopecia, especially menopausal women. The levels of estrogen and progesterone hormones in the body decrease, and testosterone sometimes increases, but the clinical manifestations are different from men. Usually, the forehead and top hair are diffuse and sparse. Androgenetic alopecia has a genetic predisposition, a history of hair loss in the family, severe acne and a lot of oily face in adolescence, all belong to the high-risk group.
　　Dieting to lose weight is easy to cause hair loss.
　　In addition , when dieting to lose weight, partial eclipse, indigestion and other reasons cause malnutrition, the body will use the only resources in the most important places. Obviously, hair follicles are not such places. The dermal papilla cannot absorb enough protein, B vitamins, iron, etc., and the hair tends to thin and fall off. Overwork, poor rest, emotional instability, neurological dysfunction will reduce the blood supply to the scalp, and the hair may also fall out due to lack of nutrition.
　　Some people find that they lose a lot of hair when they wash their hair, so they become cautious and dare not wash it. In fact, the average person loses 50 to 100 hairs per day, while “sprouting” about the same amount of new hair. You need to be vigilant if you lose more than 100 hairs per day and last for more than 2 months. However, if people with excessive oil secretion do not clean their scalp in time, the secretions and dust will mix and accumulate, which will easily block the hair follicles, cause folliculitis or scalp infection, and increase the chance of hair loss. In addition, frequent “tossing” of the hair will also cause hair loss. For example, frequent ironing, dyeing, braiding, etc., the hair follicles are damaged by high heat, chemical agents, and excessive stretching, and gradually shrink and die, and the hair will naturally gradually move away from you.