Can hair loss occur due to stress?

I have noticed that there is a remarkable amount of hair on my pillow in the mornings, in my shower drain, on my brush and on my clothes. I am going through a very difficult emotional experience and am not surprised that my body is showing signs of my being a little out of sorts. I have long hair and, as my hairdressers have always commented, I have a lot of hair. Of that I am lucky but I also know, because of that, what it's like to lose hair. My hair is usually everywhere! But this isn't like that now. I know I am going through a stressful time so I want to be extra careful. What should I do if I feel this hair loss is due to stress?

lucia-mend

F, 43, New York

Hair loss due to stress can definitely happen.  Some even experience alopecia (baldness in parts or in whole).