There may not be a single cause of hair loss in many cases but rather a number of factors may contribute to thinning or losing hair.
The
following 13 point checklist will help you identify which causes of
hair loss may apply in your case. But first a word about hair growth
cycles.
Hair Growth Cycles
Hair is constantly going
through cycles of growth, resting, shedding. When hairs that are lost
are not replaced, or when more hair follicles go into the resting phase,
hair loss becomes noticeable.
While there is ongoing debate regarding causes of hair loss, the list below shows many of the common contributing factors:
#1: Ageing
The
period for hair loss is between the 20 and 50 years of age. Some
individuals arrive at the advance stages of hair loss sooner than others
although it becomes increasingly evident as people advance in age.
#2: Cosmetic Chemicals
This can be an unrecognized cause of hair loss, especially bleaching, permanents, and coloring products.
#3: Drugs/Medications/Radiation
This
cause of hair loss can include anticoagulants, antidepressants,
contraceptive pills, amphetamines, some arthritis medications, some
antibiotics, some blood thinners, medicines for gout, drugs derived from
vitamin-A, certain drugs for ulcers, beta blocker drugs for high blood
pressure.
Cancer treatments such as chemotherapy and radiation
therapy halt the growth phase of hair follicles which results in a
sudden hair loss as those follicles all shed their hair at about the
same time.
#4: Heredity
Androgenetic alopecia is the
term used to describe a genetic predisposition in men and women for
pattern baldness or pattern hair loss. Although there is a dominant
tendency for male pattern baldness, female members of a family can be
transmitters as well.
#5: Hormonal Imbalance
If the
male and female hormones, androgens and estrogens, are out of balance,
hair loss may result. Also an overactive or underactive thyroid gland
can contribute to hair loss.
#6: Illness and Severe Infections
These can include scalp fungal infections, Thyroid disorders, Hyperthyroidism, Hypothyroidism, Diabetes, Lupus.
#7: Immune System Disorder
Alopecia
areata is an immune system disorder which causes hair follicles to stop
producing hairs. Advanced forms of the disorder are identified by the
terms alopecia totalis when all head hair disappears, and alopecia
universalis which results in all body hair disappearing.
#8: Menopause
This
can be a main cause of hair loss in women. Due to hormonal changes
after menopause, some women find their hair begins to thin.
There
are a variety of treatments available involving hormone replacement
therapy (HRT). There may be side effects in some cases and
experimentation may be necessary under the guidance of a physician.
#9: Poor Blood Circulation
Poor
blood flow to the scalp, insufficient nutrients in the blood, or poor
drainage of waste products through the lymphatic systems can all
contribute to hair loss.
#10: Pregnancy
Three to six
months after delivering a child, many women notice a degree of hair loss
as the hair goes into a resting phase because of the physiological
impact of the pregnancy on the body.
#11: Pulling
Traction
Alopecia is the term used to describe loss of hair from constant
pulling, as with tightly braided hair styles such as pony tails.
Also the improper use of curling tongs or rollers can tug the hair so it weakens.
#12: Sebum Buildup
A
basic cause of hair loss is sebum buildup in the follicles which
attacks the hair bulb, the rounded area at the end of a hair strand
which is rooted in the follicle. Sebum causes the hair bulb to shrink so
the hair is not as well rooted.
After the hair falls out the new
hair strand growing in that follicle is weaker and thinner and the
process is repeated until the hair follicle is so damaged it dies.
(Sebum is a fatty substance secreted from the sebaceous glands most of
which open into hair follicles.)
#13: Stress and Nervous Disorders
Telogen
Effluvium is the term used for a slowing down of new hair growth
because of sudden or severe stress. The stress triggers a large number
of hair follicles to enter the resting stage, so a few months after the
stressful event, those follicles shed hair at about the same time.
From
the list above you may be able to identify the main cause of hair loss
in your case. Don't hesitate to get professional advice from a medical
practitioner if the reason is beyond your direct control. Early action
can save much anxiety later!