Two things in addition to Sqad's comment. Google telogen effluvium which will tell you about stress related hair loss....and it helps to choose the right parents which i did not. As a woman it sucks being bald but a wig is the only reliable answer. She (and you) might like to look at rogaine/regaine which is the only clinically proven hair regrowth treatment but it doesn't always work, doesn't produce masses of hair and you only keep the hair while you carry on with the treatment.