Why does hair fall out?- Hair Growth Cycle
People typically lose about 100 hairs each day. This usually doesn’t cause noticeable thinning of scalp hair because new hair is growing in at an equivalent time. Hair loss occurs when this cycle of hair growth and shedding is disrupted or when the follicle is destroyed and replaced with connective tissue.
The hair on your head goes through a life cycle. This life cycle involves growth, resting, and shedding. It’s common for people to lose around 100 hairs each day.
Hair Growth Cycle
The hair on the scalp grows about .3 to .4 mm/day or about 6 inches per annum. Unlike other mammals, human hair growth and shedding are random and not seasonal or cyclical. At any given time, a random number of hairs are going to be in one among three stages of growth and shedding: anagen, catagen, and telogen.
Anagen
Anagen is the active phase of the hair. The cells within the root of the hair are divided rapidly in this phase. A replacement hair is made and this hair pushes the club hair up the follicle and eventually out. The Club hair is the hair that has stopped growing or is not any longer within the anagen phase.
During this phase, the hair grows about 1 cm every 28 days. Scalp hair stays during this active phase of growth for 2 to 6 years.
Some people have difficulty growing their hair beyond a particular length because they need a brief active phase of growth. On the opposite hand, people with very long hair have an extended active phase of growth. The hair on the arms, legs, eyelashes, and eyebrows have a really short active growth phase of about 30 to 45 days, explaining why they’re such a lot shorter than scalp hair.
Catagen
The catagen phase is a transitional stage of hair. About 3% of all hairs are in this phase at any time. This phase lasts for about two to 3 weeks. Growth stops and therefore the outer root sheath shrinks and attaches to the basis of the hair. This is often the formation of what’s referred to as a club hair.
Telogen
Telogen is that the resting phase and typically accounts for six to eight of all hairs. This phase lasts for about 100 days for hairs on the scalp and longer for hairs on the eyebrow, eyelash, arm, and leg. During this phase, the follicle is totally at rest and therefore the club hair is totally formed. coitus interruptus hair during this phase will reveal a solid, hard, dry, white material on the basis. About 25 to 100 telogen hairs are shed normally every day.
But If you experience more sudden loss, loss in patches, or overall thinning, you’ll want to ascertain your doctor.
Some shedding is temporary and should respond well to changes in diet, certain treatments, or lifestyle changes. Other losses could also be more permanent or not stop until an underlying condition is treated.
There could also be a more significant reason for your hair loss once you start seeing your scalp or bald spots.
Various Causes of Weight Loss
Hormonal changes
Thyroid disorders
Stress
Medications
Nutritional deficiencies
Lupus
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