Why does hair fall out?
Under normal conditions, in the head of any person, there are approximately 100,000 hairs that, like everything in the body, have their own life cycle, which covers between two and six years (anagen phase). During this time it grows at a rate of one centimeter per month. Then it stops growing and during a period of four weeks (catagen phase), begins to weaken until it falls, leaving its place to new hair that is born from the same follicle.
In fact, all people lose a few hairs every day: between 50 and 100, although in autumn this amount can double; but it is easily renewed and it is normal to maintain the volume and density of the scalp.
However, it is not always so. Both in men and women there are situations in which more hair fall out of those that later come out and the hair begins to thin, to lose density, leaving the skin to be interspersed or generating areas lacking hair, i.e. bald. It is the so feared alopecia, more frequent in man for genetic reasons, although there are many types and numerous causes that can generate it, regardless of whether it is a man or a woman.
A follicle has the ability to generate up to 25 hairs in succession. But there are factors that can induce the follicle to run out before it should and stop generating new hair, opening the door to alopecia or baldness. In general, it is a hormonal issue whose origin is the male hormone called dihydrotestosterone, which helps to shorten the life cycle of the hair since when one falls the next one that is born from the same follicle is weaker and finer until it no longer comes out a new one.
This is how the so-called androgenetic alopecia occurs, which has an important hereditary component, and which constitutes the origin of 90% of male alopecia. In fact, this situation begins in 25% of cases from 25 years, between 30 and 50 in 30% of men and from 50% in the rest.
Why does hair fall out
But there are other factors that can accelerate hair loss or even produce hair, as in fact happens in 10% of cases of male alopecia. Seborrhea or excess of fat is one of them, although hair hygiene, pollution, stress, situations of high emotional impact or smoking also intervene. All this has a common effect, as is the blockage of free radicals and, therefore, the beginning of an oxidative process that negatively affects the blood supply to the hair follicle, reducing its capacity and strength, which significantly weakens the hair.
The hair care, with a good hygiene or cosmetic products indicated by a dermatologist could avoid or in any case slow down this hair loss, prolonging its life cycle, its thickness, its resistance, and its density.
Hair loss in women
Hair loss is not an exclusive fact of men, but can also occur in women, for which it is a question of the image that can be dramatic and have a very negative psychological impact.
The normal thing is that in women the loss of capillary density begins with the arrival of menopause, before the fall of estrogen levels that occurs and the increase in testosterone. But there are many other causes that can cause alopecia in young women, among which are alterations in hormonal balance or thyroid problems. In fact, the clearance of the hair by the loss of thickness and density of the same can be a clinical sign that something is not going well in the body and should be a reason to go to the consultation of a dermatologist to identify the cause and treat it properly.
On other occasions, just as in men, oxidative factors such as lack of hygiene, excess fat, the use of inappropriate cosmetic products, diet, lack of exercise, smoking or pollution can favor the excessive loss of energy. hair and the weakening of it.
But in most cases, the identification of the cause and the appropriate treatment, together with good hair care, can restore normalcy and allow the recovery of capillary density.