Yes, that's correct. I should have specified that it's rare, and it's extremely dangerous to leave appendicitis untreated.
I was morbidly curious about how appendicitis was treated before the advent of aseptic surgery, and apparently it was mostly "just let the patient die". But several treatments seemed to help, including _massage_ of the area along with a kind of yoga-like contortions. Apparently, it sometimes could "unclog" the swollen appendix and let the pus drain into the colon.
Here's an article in JAMA that describes it: https://jamanetwork.com/journals/jama/article-abstract/44765... from 1896, no less (sidenote: and you have to pay to read it).
Another side note, I used to be a professionally certified masseur (about 20 years ago) and we were trained to recognize the signs of appendicitis. It can be almost completely asymptomatic until the appendix is almost bursting.