Hair science and type of hair loss

Note that even if humans shave their scalp, there are lethal effects that derive from no-existence of hair on its body. Scalp hair and body are not really essential in man's physical health. However, the hair is of great help to protect human beings and all kinds of mammals for that matter, from excessive cold or hot.

Scalp hair grows every year to 6 inches in length. That is 0.3 mm -0.4 everyday. There are no definite season or cycle in the shedding of human hair. One may experience hair loss every time. At the same time, a random number of strands of hair can suffer any of the three stages of shedding hair and hair growth. These stages are anagen, catagen and telogen. During the anagen phase, 1 centimetre is added to existing hair length every 28 days and scalp remains at this stage of active growth for at least two years to six years. The catagen phase, the next step after anagen is the end of the hair growth. The catagen phase is the phase in which the body produces new hair and usually lasts two to three weeks. The last stage is the telogen, where eight percent of the hair is usually at rest. When a hair in the telogen phase, phase I was pulled from the scalp, will prove to be a dry, white, hard to root and typically lasts for about 100 days to the hairs found at the scalp.

Everyone is living these three phases of hair growth. However, due to several issues, from environment to genetics, the result is varied, causing alopecia, or baldness for some. And since there are several causes, there are also different types of hair loss and treatments.

The most common type of hair loss is Alopecia or the so-called baldness male/female. Hair loss can be seen on most top of the scalp. For men, receding hair line is the most visible sign of androgentic alopecia.

The second most common type of hair loss is the Telogen Effluvium (TE). This type of alopecia is commonly linked to severe or sudden stress that causes the hair to shed. Even if it happens to men and women, the latter is usually affected by YOU due to some events that only they can experience how childbirth, stopped taking oral contraceptives and miscarriage. In most cases, YOU are a temporary loss of hair and hair will grow back soon when the person has already recovered from the stress.

We also have auto-immune disorder called Alopecia Areata hair, which can be experienced in the first place during childhood. As mentioned two types of alopecia, also affects men and women. The first sign of Alopecia Areata is that irregular hair loss usually occurs on the scalp. He who has Alopecia Areata can also undergo severe hair loss causing all the hair of the scalp shed. There are also some cases of Alopecia Areata, where one not only experience loss of scalp hair but the loss of all body hair as well.

Author is the webmaster of hair loss treatment. You may be interested in Science of hair and understand hair loss on women [http://www.squidoo.com/women_hair_loss].