What Type of Doctor Should I See for Thinning Hair?

Hello,
I would suggest you to see an internal speacialist to figure out the reason of the loss and thining. 

I would suggest you see a hair transplant doctor, a dermatologist,or  an anti-aging doctor in that order.

Hair loss should be assessed by a hair loss specialist, which is usually either a hair restoration surgeon or a dermatologist who treats hair loss.  They will perform a history and physical examination to determine the cause of hair loss and appropriate treatment options.  There are many different causes of hair loss, particularly in women.  Hair transplant can still be a great option in women, but a thorough evaluation and explanation of all treatment options should occur first.  A consultation with a specialist is recommended.Best,