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ABNORMAL HAIR GROWTH IN WOMEN
While
we all know that hair loss is one of the most devastating events
a woman can experience, an equally troubling problem is unwanted
hair growth. In this case, we are referring not to the hair of
the head, but that found on the body. As a young girl matures
and enters into puberty, her body begins to produce hormones
which cause the maturation and development of the primary and
secondary sexual traits. These hormones also cause the
development of thick, darker (terminal) hairs in specific
places.
Where and how much hair develops is dependent on her genetic
make-up and ethnic background. Women of Mediterranean descent
tend to develop more terminal hair on the arms and legs than do
women of Asian ancestry, while women of European descent fall
somewhere in the middle when it comes to developing body hair.
Our modern society has deemed that body hair on women is an
undesired trait, and over the years women have developed a habit
of shaving the body parts where such unwanted hairs are found
(underarms, legs, etc.). Even the parts of the body where such
hair is expected are carefully "groomed" so as not to appear
"too hairy". This attitude toward body hair on women has become
so ingrained (at least in American culture) that the sight of a
woman with normal hair development is considered grotesque.
Yet, millions of women today experience what can be categorized
as abnormal hair growth. Such hair growth is heavier than would
be normal for someone of a particular ethnic background and
genetic parentage. There are many factors which can cause this
type of hair growth. The best method of dealing with the growth
depends on which of the factors (or combination of factors) is
the cause of the growth in a specific case.
The most common factors for abnormal hair growth are:
• Altered Androgen
Metabolism -
The skin and fat cells of the body can convert weak forms of
androgens (male hormones) into more potent ones. Altered
Androgen Metabolism causes abnormal hair growth when the skin
and fat cells convert testosterone into dihydrotestosterone (DHT).
• Increased Androgen
Production -
The ovaries produce testosterone as a part of normal
developmental function. Likewise, the adrenal glands naturally
produce dehydroepiandrosterone sulfate. When either of these
glands over-produces their respective androgens abnormal hair
growth can result. The cause is more often the fault of the
ovaries than the adrenal glands, but there are several
recognized instances where the adrenal gland causes such
problems.
• Decreased Androgen
Binding in the Circulation -
The hormone levels in the body are regulated and balanced
normally. The liver produces a substance called Sex Hormone
Binding Globulin (SHBG) which binds testosterone into an
inactive form. Estrogen stimulates the liver to produce SHBG
which in turn reduces the amount of free androgens in the blood.
Androgens decrease SHBG in the blood. A decrease in estrogen
will also decrease SHBG production, therefore increasing the
amount of free androgens available in the blood, and only free
androgens are biologically viable. With more free androgens
there is an increase in hair growth.
• Exogenous Androgens -
Sometimes a person taking medications for hormone therapy (Estratest,
danazol), body development (such as anabolic steroids and
body-building supplements) or to control pregnancy (birth
control pills containing norgestrel) can develop abnormal hair
growth. Even certain hormone-containing skin creams (used to
treat specific conditions) can be absorbed into the bloodstream
and result in hair growth.
The first thing a woman should do who is concerned about an
abnormal amount of hair growth (or about growth in unusual
areas) is to consult her doctor. With a few blood tests he can
usually pinpoint the specific cause of the abnormal hair growth
and advise her on the best course of treatment for the
underlying cause.
However, generally speaking, the hair growth caused by hormonal
imbalances or over-production will not go away once the
imbalance is resolved. It must be dealt with using traditional
hair removal methods or waxing.
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