most helpful answer i'm sorry to hear you're experiencing this. it sounds quite unpleasant! unfortunately it's impossible to answer your question in a forum like this because diagnosing the problem requires a physical examination. i suggest you consult your primary healthcare provider for an exam. that said the situation doesn't sound dire. a lump in the area you describe would probably be a nodule in the skin such as a fatty cyst. of course if you're talking about a lump on the ribcage near breast tissue then this would be a concern. but i'm reading your question as a lump underneath the bottom of your ribcage on the left side. at any rate a trip to the doctor is in order to get some answers. wishing you well!
i have a lump under my lower left rib that sometimes causes pain. what is it?