Telogen effluvium is the transient increased shedding of normal club hairs (telogen) from resting scalp follicles secondary to accelerated shift of anagen (growth phase) into catagen and telogen (resting phase), which results clinically in increased daily hair loss and, if severe, thinning of hair.
In the normal scalp, 80 to 90% of hairs are in anagen phase, 5% in catagen phase, and 10 to 15% in telogen phase; 50 to 100 hairs are shed as they are replaced daily. With telogen effluvium, many more hairs than normal are shed daily. The precipitating stimulus for telogen effluvium results in a premature shift of anagen follicles into the telogen phase.
If you have telogen effluvium, you'll notice more hair than usual accumulating on your pillowcase, on the shower or bathroom floor and in your hairbrush. Your scalp hair may feel or look less dense than usual. Often, though, the hair loss is subtle, and other people may not notice anything different about your hair.
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