How do they know that Sebhoraic Dermititus and Psoriosis do not cause hair loss? You wrote on your blog once that it can cause reversible hair loss indirectly by the inflammation accelerating telogen effluvium. Can the inflammation in someone that does not have telogen effluvium do this? Many (not all) of my outer brows fall out by just touching them gently. I have sebhoraic dermititus, is this accelerated a normal symptom of the condition or does this mean I also might have telogen effluvium?

• Seborrheic dermatitis causes scaly, itchy, red skin and dandruff. It is a skin condition. It is not a hair condition.
• Telogen effluvium is diffuse hair shedding which is triggered by some form of stress that makes the hair go into the shedding (telogen) cycle. Hairs usually grow back in 6 to 12 months.

I suppose any inflammation or trauma or stress can cause hair loss, but these types of hair loss are generally reversible and do not occur in everyone… just some susceptible people. I suppose extreme seborrheic dermatitis can trigger telogen effluvium, but it would be rare. It may cause some hair loss from scratching producing traction alopecia (not as drastic as telogen effluvium).

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