Causes of Sudden Hair Loss in Women

Ninety percent of hair loss cases in women can be attributed to hereditary thinning of hair. Thinning of hair in such cases starts in an early age (20-30) which can even lead to pattern baldness in women. However, hair loss in women is not always of that serious nature. Normally, hair loss in women can be reverted.

There are a number of reasons for such sudden but restorable hair loss. It is advisable that women in such cases see a hair restoration physician who is able to evaluate the causes for the hair loss. Young women having sudden hair loss may also need to do a hair analysis test for ascertaining nutritional deficiencies or for ruling out certain causes. the sudden hair loss occurring in women can be categorized as follows:

Drugs that cause hair loss

Telogen effluvium

There are a large number of drugs that cause hair loss leading to a condition which is called telogen effluvium (TE). in this case, most hair in active growth phase is shifted into a resting (telogen), non-growth stage. Hairs that remain in a non growing stage for few months are finally shed in large numbers. Some times this condition can be confused with genetic female hair loss. However, normally TE is characterized by generalized thinning of the hair which does not follow any particular pattern. There is more thinning on top of the scalp than at the sides and back of the scalp. the hairs that are shed are typically telogen hairs which can be recognized by a small bulb of keratin on the root end. Drugs that are known to cause sudden hair loss are the following:

oOral contraceptives

oAnti thyroid medication

oBlood pressure medication (such as beta-blockers or water pills)

oBlood thinning medication such as coumarin, heparin and propanolol

oExcessive vitamin a

oCholesterol-lowering drugs

oAnti-histamines/ulcer drugs

oAnti-convulsant drugs

oAnti-thyroid drugs

oNon steroidal anti-inflammatory drugs

oArthritis drugs

oTricyclic anti-depressant drugs

Telogen effluvium is not normally a permanent form of hair loss. Eventually, the hair follicles can recover. Recovery and return to normal hair density is very slow and can also take many months after the causative factor is removed.

Anagen Effluvium

Besides the telogen effluvium, there is another condition called as anagen effluvium which can be induced by certain drugs. Drugs that cause this kind of hair loss are cytoxic drugs that are given for cancer therapy. these drugs and other such stop the proliferation of cells which are responsible for hair growth. in contrast to telogen effluvium, anagen effluvium involves the shedding of the anagen hair which can be recognized by a tapered or feathered root end. This condition results in rapid hair loss, sometimes to extent of loosing all the scalp hair. the hair loss can be very extensive, but often reversible when the medication is stopped.

Other than the drugs causing hair loss, there are a number of other factors responsible for sudden hair loss. these include the following:

oDiet deficiency - Lack of vitamins or minerals and particularly iron

oCrash dieting - Hair follicles in this case do not grow for the lack of nutrients.

oHormones/Pregnancy/Childbirth - Abnormal hormone levels in women especially during pregnancy and child birth are known to result in hair loss due to lack of nutrients, as the embryo or feeding the baby causes a drain on supply

oFever induced alopecia - High body temperature, in response to infectious chronic disease, stresses dividing cells of the hair follicle and they respond with reduced activity and stop growing.

oUltra violet (UV) radiation - low dose UV radiation may destroy some of the sensitive hair follicle cells and slow down growth activity

oAcute blood loss - Blood loss effectively starves the hair follicles of nutrients forcing them into reduced activity

oHyperthyroidism or
Hypothyroidism - Under and over activity of thyroid hormones have a profound affect on hair follicle activity leading to hair loss.

oExtreme physical stress such as surgery - Surgery places extreme physical and emotional stress on the individual and can lead to telogen effluvium

oEmotional stress - Chronic emotional stress or sudden shock can adversely affects hair follicles although the mechanism by which it works is not known

oSevere illness - Severe or chronic illness alters the normal functioning of the human body and this may have an impact on hair follicles.

oExcessive washing, drying and perming - all these process cause disruption of hair cuticles at some places resulting in swelling and fraying at those places. It may ultimately lead to hair loss.

But as in most cases hair loss is not permanent. Hair growth can be restored after the factor causing hair loss is removed.

Causes of Sudden Hair Loss in Women