Feeling pain on left side just near to 3-4th rib from the bottom. It feels like some sort of swelling in a vein. But as such from outside, I can't see any swelling in that area. Also, it is consistent from last7-8 days and triggers with particular postures like any kind of stretch(bending forward or twisting either side) in that area or muscle or vein.
Is anything serious and what can be the reason and cure for it?