How many hairs on a person's body and why do they fall out?

Understanding the hair growth cycle is crucial to understanding why hair loss occurs and where the problem of baldness arises.

On the number of hair, growth phases and causes of hair loss.

Hair itself is a very important part of the human body. It not only has a psychological function (thanks to beautiful, lush hair, a person feels more socially attractive), but also a protective function, as it protects the skin from cold or harmful effects of UV radiation. For this reason, Mother Nature gives people "plumage" soon after conception - hair follicles begin to grow even before 9 weeks of pregnancy. In addition, between the 12th and 14th weeks, the embryos begin to develop a thin hair fluff, which is responsible for protection and rolls naturally.

On the number of hair, growth phases and causes of hair loss.

"Growing up" hair - is the result of a process that takes place every hair on your head. The hair growth cycle begins in the hair follicle and continues in 3 phases:

  • analogen - the active phase of hair growth, but it takes about 5 years;
  • catagen - a short two-week phase, transitional between growth and rest;
  • tegen - resting phase, during which the hair falls out, lasts about 3 months.

It is clear from this that the average life cycle of hair is about 5 years (sometimes even 7). During this period, about 100000 hairs appear on the head, of which about 100 hairs fall out every day, which is a natural consequence of the cycle. A study of the trichogram shows that the average person's head has 85% of hair in the anagen phase and 15% in the telogene phase. If several separate phases at the same time for some reason "retire", then in the next few months the problem of alopecia may appear.

The causes of hair life cycle disorders can be attributed to:

  • excessive tension of the hair with rubber bands, hairpins;
  • too intensive therapy for hair growth;
  • mechanical damage due to brushing, burn;
  • hormonal disorders (pregnancy, menopause, hormonal background failures);
  • scalp diseases (mainly dandruff, AD, mycosis);
  • iron deficiency.

Reasons for hair loss may be of dual nature. First, they may represent a "temporary state of emergency" caused either by improper care or harmless hormonal changes. Secondly, hair loss can be a sign of a scalp disease (psoriasis or seborrheic dermatitis). If in the first case, it is possible to prevent hair loss on your own, in the second case, you should resort to a specialist.

It is very important to choose the right care for your hair and skin. Effective shampoo from hair loss should contain:

  • information that he has passed dermatological tests;
  • substances that strengthen hair roots;
  • ingredients that improve the protection of hair from the harmful effects of external factors;
  • ingredients that help close the hair cuticle and thereby smooth the surface of the hair, which in turn prevents hair tangling and makes it easier to unbind;
  • vegetable oils and extracts.

It is also important that the labels of hair loss shampoos do not contain information about parabens, preservatives and other highly irritating substances. However, there may be a mention of rather controversial silicones, because it is because of them that the hair in the anagen phase becomes smoother and therefore less prone to mechanical damage.

The causes of hair life cycle disorders can be attributed to

In conclusion, it can be summed up that on average there are about 100,000 hairs on a person's head (blondes, for example, may have 150,000 hairs, and blondes may have all 200,000). The hair itself falls out due to growth disorder in the anagen phase. It is possible to prevent hair loss through proper care, the use of special products to strengthen the hair, taking biologically active additives.