I’m gonna be honest I didn’t read that entire chapter but I think I get the gist of it. King posits that PMS is falsely understood to be a primarily mental/mood-related condition due to the underlying sexist belief that women are fundamentally irrational and overly emotional. Sure, no disagreement there. PMS has sort of become a meme and a cultural phenomenon, which may cause women and men both to play up the mood swing side of it. With that said, “The chief complaint is one or more of the emotional symptoms associated with PMS. Irritability, tension, or unhappiness are typical emotional symptoms”. According again to Wikipedia which in my experience is more accurate than any single source or anecdote.