The word “hysteria” means “womb” (just think of the word hysterectomy, if you don’t believe me).
Yep, way back when the study of mental health was in its infancy in the last century, it was deemed that such irrational, uncontrolled excessive emotional behaviour was purely feminine. So it was plainly obvious to the learned gentlemen that its origin must be in the uterus.
First coined in the days of Hippocrates, and largely forgotten, Freud repopularised the term and wrote several serious papers about it. Thanks, Sigmund – it obviously wasn’t enough that we were supposed to envy those other things.