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The Hair Follicle

     

Overview
The hair follicle is the wrapping where the root is kept, 4 mm under the scalp. That is where the hair’s life is developped.

Contents
link The Hair Follicle’s Structure
link The Hair Follicle and Androgenetic Hair Loss
link The Hair Follicle and Alopecia Areata  


The Hair Follicle’s Structure

Each follicle comprises different locations, all of which are essential to the production of keratin: the papilla, through which the blood arrives; the matrix, which generates the keratin cells and transforms them into hair (keratinisation);  the root sheaths, which guide the forming hair stem.

follicle


A hair follicle is programmed to make the hair grow without interruption and to renew it, for the whole of our life, as soon as it reaches the end of its cycle.  If negative factors affect it, the hair can thin out or fall prematurely. By treating those different locations, it is possible to awaken a dormant follicle, for as long as it has been so for less then a year. For more on this, read linkHair Growth and Regrowing: Where Exactly to Act? Beware! Beyond a year, if nothing has been done, the follicle dies and it is too late to do anything.

The sebaceous gland, which produces the sebum, is annexed above the follicle. It is essential that the sebum be completed evacuated outside the scalp and not within the follicle, so as not to asphyxiate the root’s action.

 

The Hair Follicle and Androgenetic Hair Loss

The hair follicle’s most common disease, for both men and women, is linked to androgen hormones: the hair starts by losing its luster; it then progressively thins out, with fewer regrowing hair, and a loss in hair density.

Thinning of the Hair
The thinning of the hair is a very reliable sign of a starting androgenetic alopecia. But it is insidious, and can start many years before one ever realises it. 

That is why some say their hair has always been thiner towards the front of the head: they simply do not remember what their hair used to be like (see framed section on the right). That is especially the case if the hair never really seemed to fall much.

Fewer Regrowing Hair
When hair no longer grows, after having fallen, it is only the final consequence of its progressive thinning out. 

Here is why: a thinned out hair corresponds to a progressively thinning hair follicle under the scalp. It will produce increasingly weaker regrowing hair, every time that the fallen hair is replaced.

A Misconception...

The idea that some hairs, by nature, are thinner or less dense at the front of the head, is wrong.

At birth, we have a given number of hair follicles that all produce hair of equal thickness, regardless of the area of the head.

However, throughout our life, two parameters come to alter the original density: the hair thins out and/or there is fewer regrowing hair.

 

If nothing is done to neutralise the process, the ill follicle ends up no longer producing any regrowing hair. It then sinks into the dermis and the skin in that precise spot becomes soft, which correspondingly diminishes the amount of hair.

The Hair Follicle and Alopecia Areata

The hair follicles’ disease is very different for alopecia areata. In the case of the latter, the follicles suddenly cease their activity, although they are not destroyed. Their matrix no longer produces keratin, but its work is simply interrupted, as if it were on strike, and ready to resume. This is exemplified by the scalp’s skin, which stays normal, keeping its pores. That is different from androgenetic hair loss, where the follicles, which have become inactive if not treated, definitely disappear into the dermis.


FOR FURTHER INFORMATION :
linkHair Production by Follicles
linkThinner and Fewer Regrowing Hair (with sketches). What to do?
linkAndrogenetic Hair Loss/Alopecia linkMen linkWomen
linkImpact of Androgen Hormones on Hair Loss linkMen linkWomen
linkAlopecia Areata and Hair Loss
- Daily Hair Loss: What is the Norm?

FOR TREATMENT :
- Anti-Hair Loss Treatments in France
- CLAUDERER Anti-Hair Loss Treatments 
- Hair Growth an Regrowth: Where Precisely to Act?
- Clauderer in-Depth Diagnosis

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