Hair disorders can be caused by any of the following:
- Alopecia (non scarring) – skin disorders, certain drugs, certain diseases, autoimmunity, iron deficiency, severe stress, scalp radiation, pregnancy, or pulling at your own hair.
- Alopecia (scarring - skin disorders, diseases, or bacterial infections.
- Hirutism – excess of androgen (steroid hormone that stimulates development of male sex organs and secondary sexual characteristics). This overproduction of androgen could result from certain drugs or conditions.
- Hair shaft disorders – over processed hair (coloring, permanent waves excessive heating) or certain diseases.