Hair Loss Causes and Risk Factors

of hair loss is associated with the tendency of hair follicles stop producing hair growth. Partial or complete loss of hair is called alopecia. Hair loss usually develops gradually and May be accidental, or diffuse.

interesting facts about hair and hair loss

• Hair is the fastest growing tissue in the body, second only to bone marrow.
  
• The average scalp contains about 100,000 hairs.
  
• Approximately 100 hairs are lost from your head every day.
  
• Each individual hair survives on average 4-7 years, during which grows about half an inch a month.
  
• you need to lose about 50 percent of the hair before hair loss becomes noticeable.
  
• In the United States, 30 million women experience hereditary hair loss. 70% of women with thinning hair can be attributed to hereditary hair loss.
  
• hereditary hair loss or androgenetic alopecia is the most common form of hair loss for men, which represents more than 95% of all men.
  
• androgenetic alopecia affects many more men than women. About two-thirds of men experience some degree of hair loss at the time they are 35 years old, and about 85% have significantly thinning hair 50.
  
• In the U.S., was not elected a bald president of the television age began.

The most common cause of hair loss is genetics - inherit the tendency to lose hair from either or both roditelja.Medicinski term for the genetic predisposition for hair loss is "androgenetic alopecia".

In androgenetic alopecia, the genes affect how hair grows. They cause a sensitivity to the class of hormones called androgens, including testosterone, which causes hair follicles (which hair grows from) to shrink. Smaller follicles produce thinner hair and eventually none at all. Thus, androgenetic alopecia is caused by the failure of the body to produce new hairs and not excessive hair loss. Heredity influences the age at which you begin to lose hair and developmental speed, pattern and extent of your baldness.

Androgenetic alopecia accounts for more than 95 percent of hair loss in men. By the age of 35 years, two-thirds of American men will experience some degree of hair loss and 50 years of age about 85% of men have significantly thinning hair.

Men generally develop bald spots on the forehead area or on top of the head. When men have hair on top of the head have a genetic susceptibility to the male hormone testosterone, while the hair on the sides and back of the head does not have these genetic traits, and therefore are not affected. For this reason hairs removed from the side and back (donor hair) will keep your genetic predisposition when transplanted and continue to grow, when he moved to the top of the head where hair loss occurred.

for women, female pattern baldness is the most common type of hair loss. It may begin in adolescence, but most commonly seen after menopause. Women have an overall thinning of the hair through the skin, and the frontal hair usually remains intact.

Other causes of hair loss and risk factors

of hair loss is usually not a disease but is related to aging, heredity, and testosterone. In addition to the usual male and female patterns from a combination of these factors, other possible causes of hair loss, especially if there is an unusual pattern, include:

• side effects of medications or medical treatments. Some drugs used to treat gout, arthritis, depression, heart problems and high blood pressure can cause hair loss in some people. Drugs that can cause hair loss include:
  
  • cholesterol lowering drugs: clofibrate, gemfibrozil
    
  • Parkinson Medications: levodopa
    
  • Ulcer drugs: cimetidine, ranitidine
    
  • anticoagulants: coumarin, heparin
    
  • remedies for gout: allopurinol
    
  • antiarthritics: penicillamine, auranofin, indomethacin, naproxen, sulindac, methotrexate
    
  • drug derived from vitamin-A: isotretinoin, etretinate
    
  • anticonvulsants: trimethadione
    
  • antidepressants: tricyclics, amphetamines
    
  • beta blockers: atenolol, metoprolol and nadolol, propranolol
    
  • antithyroid agents: carbimazole, Iodine, thiocyanate, thiouracil

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  delayed shedding from stress. This common form of hair loss happens two to three months after a major bodily stresa.Stresnog event encourages greater proportion of follicles entering the resting phase all at the same time. Several months later, everyone is now resting follicles begin to shed their hairs at about the same time. Because of the stressful event happened months ago, most people do not connect with their hair loss. This is a temporary condition, and new hairs begin to grow within a few months. Stress can also trigger genetic hair loss. If your already losing hair stress will cause you to lose hair even faster.
  
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  Inadequate protein in diet. Some people who go on crash diets that are low in protein, or a very abnormal eating habits may develop protein pothranjenost.Tijelo protein moves will save the growing hairs in the resting phase. Massive hair shedding can occur two to three months later. This condition can be reversed and prevented by eating the right amount of protein and, when dieting, maintaining adequate protein intake.
  
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  A lack of iron. Iron deficiency occasionally produces hair loss. Iron deficiency is common for women during menstruation and pregnancy and can be corrected through proper diet or iron supplements.
  
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  pregnancy and childbirth. of hair loss that is associated with pregnancy usually occurs after birth. When a woman is pregnant, her hairs grow at very high speed. However, after a woman delivers her baby, many hairs enter the resting phase of hair cycle. It is a natural process and resolves completely in most cases.
  
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  birth control pills. Women lose hair while taking birth control pills are usually inherited tendency for hair loss (androgenic alopecia). If hair thinning occurs, a woman can consult her gynecologist about switching to another pill. If a woman has a history of female pattern loss in her family she should advise her doctor before going on the pill.
  
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  Scalp infections. infections such as ringworm can invade the hair and skin of your scalp, causing hair loss. When the infection is treated, hair generally regrows.
  
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  thyroid disease. and an overactive thyroid and an underactive thyroid can cause hair loss. Hair loss associated with thyroid disease can be reversed with proper treatment.
  
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  Patchy hair loss (alopecia areata) . Alopecia areata is classified as an autoimmune disease, but the cause is unknown. This disorder causes hair follicles to stop producing hairs. About 2% of all people experience the episode alopecia areata at some point in their life. In most cases the condition is transient and disappears by itself within 6-7 months, a growth of hair in the bald patch resumes.
  
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  of hair pulling (traction alopecia). Traction alopecia is hair loss from constant pulling, often the result of tightly braided hair styles.
  
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  of hair care. Pulling your hair back too tightly can cause hair loss. You may lose hair around the hairline, especially around the face and forehead. Using curling irons or dyes continually can also lead to hair loss. The hair usually grows when these activities have ceased.
  
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  Blow-drying may exacerbate the loss kose.Razlog that extreme heat damages the proteins in the hairs making them fragile and prone to break. Brushing the hair Blow-drying causes more damage. If you use a hair dryer, it should be placed on the coolest setting. Hair color, perms and hairsprays do not affect thinning hair.
  
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  age. As you age, your hair tend to break more easily, and hair follicles do not grow so much hair.