What is this bulge in my abdomen

Patient: I have a slight bulge under my rib cage, on the left side of my body. It makes my side hurt, up to my head, all the way through my leg. Pressure upon the area ease the pain, but it is very painful in the mean time. I don’t know what is wrong, and I don’t know if I should seek medical attention immediately, or if I can wait.

Doctor:

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