Dermnet Videos
Alopecia Videos
- Alopecia areata – Causes and Associated Conditions
- Alopecia Areata Information
- Alopecia Areata Treatment
- Course of Sudden Hair Loss Telogen Effluvium
- Evaluation and Treatment of Sudden Hairloss Telogen Effluvium
- Female Pattern Baldness and Hair Loss Causes
- Female Pattern Baldness and Hair Loss in Women
- Female Pattern Hair Loss Evaluation and Testing
- Female Pattern Hair Loss Treatment
- Hair loss and Alopecia Introduction
- Hair Loss Due To Hair Pulling – Trichotillomania
- Hair Loss Treatment and Male Pattern Baldness Medicine
- Loose Anagen Hair Syndrome
- Male Patern Baldness Causes and Hair Loss
- Male Pattern Baldness and Hair Loss Information
- Sudden Hair Loss Telogen Effluvium
- Traction Alopecia Hair Loss
- Traction Alopecia Hair Loss Treatment
- Central Centrifugal Cicatricial Alopecia
- Discoid Lupus Erythematosus – Clinical
- Discoid Lupus Erythematosus – Histology
- Discoid Lupus Erythematosus – Treatment
- Follicular Degeneration Syndrome
- Folliculitis Decalvans – Clinical
- Folliculitis Decalvans Treatment
- Hair Loss Alopecia With Scarring Information
- Lichen Planopilaris
- Lichen Planopilaris – Clinical Features
- Lichen Planopilaris Treatment
Video Topics
Sudden Hair Loss Telogen Effluvium
Telogen effluvium (TE) is a condition characterized by increased daily hair shedding. Normally, up to 100 telogen (club) hairs are shed daily. This is due to the fact that up to 10% of a person’s 100,000 scalp follicles are in telogen (the resting phase) at any given time (10% of 100,000 hair follicles is 10,000 hair follicles; with telogen lasting an average of 100 days this leads to an average shedding of 100 hairs/day). Most people actually shed 60 to 80 hairs a day because 6 to 8 % of their follicles are in telogen. TE is a perturbation of the hair cycle causing shedding of at least 120 hairs a day.
TE is caused by a sudden shift of growing anagen hairs into the catagen and subsequent telogen phases, culminating in shedding of these hairs. The shedding usually begins 2 to 5 months after the trigger because the average duration of catagen is 1 month and telogen usually lasts 3 months. Possible triggering events include severe medical illness, high fever, surgery, accidents, medications, crash diets, delivering a baby, discontinuation of oral contraceptive pills, or psychological trauma. Thyroid and iron deficiency can also lead to TE.