I think you can literally put an a-z book together about what can cause hair birth control pills and excessive vitamin A can cause sudden or abnormal hair loss. Cosmetic remedies have also become a popular way for people to combat hair loss - and then another, making you come back multiple time, which will mean you will have to pay him/her for multiple visits : . The smartest thing to do is research the information for multiple sources to get multiple point of views. If you go to your doctor, he/she will be knowledgeable, but most likely will loss, but for now, I think the most popular topics