I've had this exact same "catching rib" problem for years, no answers medically until now - never really taken seriously & I often got the impression my usual Dr thought me a bit mad for asking - she's not living with it of course - hmm
Anyway, new Dr as my usual one is on leave - tests me for H.Pylori as surprised its not been done before - I've a long history of Acid reflux problems IBS etc etc - results came back positive - new Dr thinks its likely that along with a lot of my other symptoms my stomach is inflamed by this infection & its likely THAt that catches on my ribs & makes me feel like I've just been kicked by a horse if I move the wrong way - bending - tying laces etc
so if any of you haven't been checked for H.Pylori - I'd recommend asking about the blood test
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Hurting under the bottom of left rib?.