text: i have lost alot of hair in the past 30 days. what could be wrong? i am a woman, 45 yrs. old and i'd say it was only about a month and i brushed my hair, and went to put it in a pony tail and it feels extremely thinned out. i don't have patches, but i had thick hair and now i have thin hair, very thin. i had a very simaler problem and after seeing a nutritionist i learned that i was not eating enough protein. if you are concerned go to your doctor. some blood tests can be run and you may feel better about it knowing whats causing it. there are so many different explinations for hair loss though. good luck.