I went to a dermatologist last week because I have been slowly losing my hair for about 6 months. I recently noticed the bald spots. The dermatologist did a series of blood tests (thyroid, iron, hormones, etc) and they all came out normal. I am meant to go back in about 2-3 weeks to see if there is any improvement or decline. She said she might to a biopsy then if there is no improvement. She seems pretty sure that it is Telogen Effluvium purely based on the fact I had major surgery last June. She also mentioned me trying Rogaine or cortisone shots. I want a real diagnosis. Is there anything I should I ask for? What is the usual series of tests for diagnosis? Thanks!!