Telogen effluvium is a common form of non-scarring hair loss typically characterized by diffuse hair loss in response to a physiological or psychological trigger. These triggers can be caused by or related to a multitude of factors, from genetics to disease to the simple fact of aging. Often perceived as an expected outcome of aging in men (though still moderately stressful), it can be traumatic and even life-changing to many women when they experience hair loss, sometimes as early as in their twenties and thirties.168
There are three different categories of telogen effluvium:28, 169
CATEGORIES OF TELOGEN EFFLUVIUM
Hair shedding begins to increase dramatically within 2 weeks of trigger; shedding peaks in 6-8 weeks—during this time the percentage of hair in telogen phase increases from the normal 7-10%.
Hair loss tapers off over next 6-8 week period, and percentage of hair in telogen phase gradually decreases back to normal over that time.
Chronic telogen effluvium is a separate condition that seems to occur more commonly in women, usually occurring between the ages of 40 and 60. After an initial substantial hair loss it becomes a more gradual, fluctuating hair loss. The condition can continue over several years, but seems to stop on its own. However, the amount of hair usually does not return to pre-condition volume.103
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