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Reasons For Pilosisim


The main reasons for pilosism are given below:

• Regional differences: Formation and development of hair in the bodies of women of Eastern regions and Caucasian origins are faster.
• Genetic characteristics
• Adolescence, pregnancy, menopause
• Hereditary diseases
• Certain diseases (polycystic over)
• Certain medications used
• Stress

In some humans number of hair is well over normal and it is called “hirsutism”. Pilosism other than these cases is called “hipertrichosis” and has the meaning of an increase in the number of soft hair in females. Inexistence of congenital hair is called “atrichie”.

 

Growth of hair and hair cycle

Production of hair originates from lower parts of hair follicles. Follicle activity is called as “active” when hair grows and “passive” when it is static. Initial growth of hair in the follicle is stimulated by hormones and physical stimulants.

Hair growth periods are cyclic periods following each other.

When growth stops inner sheath is damaged, body hair is taken to the surface and the relation in between the body hair and its root is decreased.

At the end of catagen phase inner sheath is totally damaged.

After this phase telogen phase that is the resting period starts. At the end of this phase, which continues for 3-4 months, body hair is totally separated from its root and falls off. Following this phase anagen phase, i.e. the newly growing phase of body hair starts.

The growth rate, duration of growth, telogen/anagen ratio of body hair depends on the place and type of body hair.
 

Stages of hair cycle:

1.- Anagen phase: It is the phase of hair growing actively.
2.- Catagen phase: It is the phase when nutrition and growth stops.
3.- Telogen phase: The phase before hair is lost; can be called resting phase.

The length of anagen phase varies among different parts of the body; catagen and telogen phases show less variation of time throughout the body.

In adults haired skin anagen phase continues mostly 3 years, catagen phase continues 3 weeks and telogen phase continues 3 months. At any time 84% of hair is in anagen phase, %2 of hair is in catagen phase and 14% of hair is in telogen phase.

Hair grows for some time and then it stops and they are lost. After a while it is regenerated.
The body hair growth stops when it gets a stimulus.

When growth stops inner sheath is damaged, body hair is taken to the surface and the relation in between the body hair and its root is decreased.

At the end of catagen phase inner sheath is totally damaged.

After this phase telogen phase that is the resting period starts. At the end of this phase, which continues for 3-4 months, body hair is totally separated from its root and falls off. Following this phase anagen phase, i.e. the newly growing phase of body hair starts.

The growth rate, duration of growth, telogen/anagen ratio of body hair depends on the place and type of body hair.