I am a 26-year-old active female who has always had VERY thick and very full hair my entire life until just a few months ago, when I noticed that my hair was a lot thinner and seemed to be breaking off very easily.  Usually, if I run my hand through my hair, I will pull out one or two strands.  I have no idea what has brought this on.  My hair has always been so thick that it was almost annoying since I always needed to have it thinned by my stylist.  Now, it is the complete opposite.  I do work in health care, so I was thinking of several possibilities, including stress or possibly even hypothyroidism, but I actually feel just fine otherwise and I don't really have any other physical symptoms or complaints at all.  I will admit, though, that around the time that this all started, I started having problems with anxiety, especially since my job can be fairly stressful, which tends to exacerbate it a great deal.  I have always been a somewhat anxious person, but it seems to be much worse lately.  I feel anxious more often than not, and any little thing seems to trigger it.  This all started happening shortly after I turned 26 back in September.  I was fine before then.  Can anxiety problems cause these types of hair problems?  I don't take any medications other than a daily multivitamin and an occasional antihistamine for allergies when they flare up.  I have tried different types of shampoos, but nothing seems to be making a difference.  I am totally confused about this.  Any ideas or suggestions?