What causes alopecia areata?

What causes alopecia areata?

Marilyn Sherlock (Trichologist) gives expert video advice on: Will my hair grow back after suffering from alopecia areata? and more...

Alopecia areata is caused mainly by hereditary traits, where a family has other auto-immune disorders, such as rheumatoid arthritis, for example. It can manifest itself in the next generation as alopecia areata. It's also closely associated with thyroid conditions.