I am 63 year old woman in good health. My TSH is 4.6 units. My doctor is monitoring my TSH and FT4, but so far hasn't put me on hormone therapy, because I seem to be relatively symptom free. I have no weight gain, I am very active (no fatigue or depression) and have low blood pressure (90/60). I can easily swim a mile and cycle 35 miles. (She believes that my fitness level accounts for the low blood pressure.) But recently I've noticed that I'm starting to loose a lot of hair in the shower. My scalp is a bit itchy. I don't want to lose my hair. I know this could be a symptom of hypothyroidism. Could it be caused by anything else? If the hair loss is caused by my thyroid, will the hair grow back after I go on hormone therapy? I don't want to take the hormones until it's absolutely necessary, but I don't want to lose my hair either.