There is a close relationship between infection outbreaks on teeth and the presence of alopecia areata or localized alopecia, a type of hair loss which has an unknown origin. Alopecia areata starts with bald patches on the scalp, and sometimes elsewhere on the body.

Everybody loses their hair. In some cases, alopecia or baldness occurs in a rather slow way; people get old yet still have some hair to be done by a hairdresser on a regular basis. Others start going bald or having thinning hair in their early twenties. What are the causes of alopecia?