The entire body is covered with hair. Hair consist of protein named keratin, which is made up in hair follicles from the outside skin layer. When follicles make up new hair cells, the older cells are let go through the skin surface at about six inches a year. The hair one can see is made of a string of keratin cells that are dead.
An adult is said to have around 100,000 up to 150,000 hairs, which in return loses up to 100 hairs each day. If a few hairs are found in your hairbrush, this is considered fairly normal and not something one should be alarmed over.
A person will have about 90% of the hair growing on their scalp at any given time. Every hair follicle goes through a life cycle, which is often influenced by things such as disease, age, and an array of different factors.
There are three phases of a hair life cycle:
This is the progressive growth of the hair lasting from two to six years.
This is the transitional growth of the hair lasting from two to three weeks.
This is a phase of rest lasting from two to three months. When the phase of rest is completed, the hair sheds and new hair is grown starting the growth cycle once more.
When people age the growth of hair slows down.
Facts About Alopecia
Hair loss types, also known as Alopecia, has different condition:
1. Involutional Alopecia
This is a normal condition where the hair on the head slowly thins down with age. This happens when more of the hair follicles rest causing the remaining hairs to be in fewer amounts.
2. Androgenic Alopecia
This genetic condition affects men and women alike. In men, male pattern baldness can begin in their teen years up into their 20’s. It is recognized with a hairline that is receding over time and from the disappearance of hair from the front of the scalp and the crown of the head. Women that suffer from this condition have what is called female pattern baldness, but this condition does not have thinning hair that is very noticeable until women reach their 40’s or after. In women, the crown is affected the most, but they also have overall thinning on the entire scalp.
3. Alopecia Areata
This condition often occurs all at once causing chidren and young adults to have the look of patchy hair loss. It can result in Alopecia Totalis, which is total baldness. Although about 90% of people that have this condition have returning hair in a few years’ time.
4. Alopecia Universalis
This is one of the hair loss types in which the entire body hair falls out including the eyelashes, eyebrows, and even one’s pubic hair.
This condition is more common in children and is considered to be a psychological disorder causing a person to pull out their own hair.
6. Telogen Effuvium
This condition causes temporary thinning of the hair on the scalp that happens with the changes in the hairs growth cycle. Large amounts of hairs enter a phase of rest during the same time that causes the hair to shed and thin.
Alopecia areata – American Academy of Dermatology
Alopecia areata – Wikipedia, the free encyclopedia
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