Telogen effluvium (TE) and chronic telogen effluvium (CTE) occurs as a result of dietary deficiencies, crash diets, high-grade fevers, anaemia, blood loss, hormonal imbalances and pregnancy etc. The word telogen is known as the resting phase of hair and effluvium means letting loose. Telogen effluvium [TE] is a form of non-scarring alopecia characterized by an acute and generalised loss of hair. In most cases, TE recovers spontaneously within 6 months however if the hair loss persists for more than 6 months, it is known as chronic telogen effluvium [CTE.], which is more difficult to treat and may lead to permanent hair loss.
When excessive amounts of hair simultaneously switch from anagen (growth) into telogen (dormancy) and subsequently shed several months later, the phenomenon is referred to as a telogen effluvium. Telogen effluviums can be acute or chronic. When the shedding lasts more than six months or persistently recurs, it is referred to as a chronic telogen effluvium. Chronic telogen effluviums have been reported mainly in women. Chronic telogen effluvium was first reported at a conference (Alopecia, Washington DC, November 1996) and later published as a newly identified diffuse form of hair loss in women Very rarely has chronic telogen effluvium been reported in men. Unlike other types of telogen effluvium, the initial onset can be quite sudden. This form of hair loss can gradually become quite extensive, all over scalp and known as permanent changes.