What causes
hair loss?
The precise cause
of the hair loss is unclear, but it appears to be genetically determined
in the majority of cases. The most common cause is an inherited alteration
in the way individual hair follicles metabolize the sex hormone testosterone.
Most women experiencing this type of hair loss actually have normal
hormonal function including, normal testosterone levels, normal menstrual
function, and fertility. Those affected are believed to experience a
higher rate of conversion of testosterone to dihydrotestosterone, or
DHT. It is the effect of DHT on the hair follicles that is thought to
be the mechanism responsible for the hair loss.
This process is
referred to as androgenetic alopecia, or genetic balding. While most
assume balding is almost always a male problem, it occurs about equally
in both sexes, affecting 50% men and 40% of women by age 50. The problem
usually begins between the ages of 12-40 years of age. It is usually
milder in women. This is attributed to differences in (1) the level
of 5 alpha-reductase and cytochrome P-450 aromatase, the enzymes responsible
for the conversion of testosterone to dihydrotestosterone and (2) the
number of testosterone receptors in the individual hair follicles of
the scalp.
Are there
non-inherited forms of hair loss in menopausal women?
Women who have abnormally
high levels of male sex hormone may also experience thinning of scalp
hair. Signs of abnormally high levels, include an increase in body,
or facial hair especially if appearing in a masculine pattern of distribution,
severe cystic acne, abnormal menstruation, breast secretions and clitoral
enlargement. Women who are experiencing these problems should speak
to their doctors about a referral to a physician who is experienced
in diagnosing and treating these problems.
Additional problems
that have been associated with hair loss in menopausal women include
anemia, thyroid disorders, syphilis, fungal infections, connective tissue
diseases such as Lupus, hormone secreting tumors, significant weight
loss and stressful life events. Alopecia areata, a condition of localized
balding is considered by many to be an autoimmine disease. Traction
alopecia is a form of hair loss associated with excess traction on the
hair either during styling, or by habitual tugging by the woman herself.
What about
poor scalp circulation and clogged hair follicles?
Commonly used explanations
for hair loss put forth by those selling over-the-counter remedies for
hair loss, such as poor scalp circulation and clogged hair follicles
have been found to have no role in hair loss. To my knowledge the products
they sell are of no benefit.
Can medication
cause hair loss?
Treatment with cancer
chemotherapy is well known to be associated with hair loss. Medication-related
hair loss is not fully understood, but thought to be due to a disruption
of the normal anagen/telogen phases of hair growth. The hair loss may
be reversible when the medication is discontinued. One research study
evaluated the reasons and rates of removal of subdermal levonorgestrel
implants (Norplant) a medication used for contraception. Among those
desiring removal, hair loss was cited as the reason 13.6% of the time.
Medication-induced hair loss is an occasional side effect of antidepressants
and other psychoactive drugs. In these cases stopping the medication
usually results in regrowth of the lost hair. Other medications that
have been implicated by some in hair loss include cholesterol lowering
medication, oral contraceptives and blood thinners.
Testosterone replacement
at appropriate levels is rarely associated with hair loss, but may be
a factor in some susceptible women. Women who experience this problem,
but desire to use testosterone replacement because it enhances their
quality of life may find that taking spironolactone while on testosterone
replacement prevents the problem.
Hair Loss
Treatment Options
Topical minidoxil
solution (Rogaine) is FDA approved for the treatment of hair loss in
women with androgenetic alopecia. Finasteride (Propecia), is presently
the most effective medical treatment for men. Given orally at prescribed
doses it promotes hair growth and prevents further hair loss in a significant
proportion of men with androgenetic alopecia. It is thought to work
by inhibiting the conversion of testosterone to DHT. Although some research
suggests it is effective for this type of hair loss in women it is not
FDA approved for this use because of a known risk of fetal malformations.
Regardless, some physicians currently use it in women who are not at
risk of pregnancy. Spironolactone (Aldactone), a medication with mild
diuretic properties has been used with success in some cases. The rationale
for its use is based on the belief that it interferes with the ability
of androgens to bind to the receptors in the hair follicle thereby not
allowing DHT to exert its effect.
If a form of treatment
is found to be effective it should be continued indefinitely assuming
there are no negative side effects, or advised to do so by a knowledgeable
physician as stopping the treatment results in a return of hair loss.
Hair replacement
surgery is an option for some women. The best candidates for this type
of treatment should have areas of dense hair growth at the back or sides
of the head available for transplantation. Women in whom a medical or
surgical approach is not effective, not feasible, or not desired may
choose to use a wig, or hair extensions.
Do I need
to see a doctor if I am having some hair loss?
Hair loss in menopausal
women is perceived uniquely by the individual woman experiencing it.
Nonetheless, in some it is capable of negatively impacting self-esteem
and quality of life. Every woman affected should address the problem
in the manner she feels is most appropriate for her. However, it is
important for women with undiagnosed hair loss to be appropriately evaluated
by a physician for causes of hair loss other than androgenetic alopecia
as there are a number of underlying medical conditions that may mimic
this condition.
Menopause
Overview
This page defines and discusses menopause, surgical menopause and
premature menopause...
Menopausal
Symptoms
A woman may experience a number of changes in the way she feels at or
prior to menopause. We call these changes the "symptoms" of
menopause. This page defines and discusses menopausal symptoms and their
treatment...
Sex
and Menopause
Loss of sexual desire and ability to participate in and enjoy sex is
not a normal part of aging. Dr Nosanchuk explains why a menopausal woman's
desire to have sex and her capacity to physically participate in sex
are both affected by her menopause...
Menopause
& Weight Gain
Dr Nosanchuk discusses the factors that influence weight gain in
menopausal women...
Menopause
& Migraine
This section discusses the nature of migraines and its relationship
to menopause and hormone levels. In addition it provides strategies
that may reduce the number and frequency of headaches...