What is this pain years after last abdominal surgery?

I've had about 10 abdominal surgeries, the latest three years ago. An adhesion caused me to lose 2.5 feet of my colon. Several times since, I have felt like something was open and raw inside. Each time, I have just waited it out. Today I lifted something heavy and it didn't hurt until about two hours later. Is this normal? It is still hurting a lot. Should I just lie back for a day or two and wait till it goes away again? I have no relevant photos as the pain is inside. Thank you.

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