One of my kids had his appendix out last year, and I asked a similar question. My recollection was: Blockages can form and resolve on their own -- it's possible

One of my kids had his appendix out last year, and I asked a similar question. My recollection was: Blockages can form and resolve on their own -- it's possible he'd had blockages before, felt pain, but they resolved before an infection could occur. You could be having this happen right now, but it could resolve later in the day and you never notice anything. Or the blockage could be too severe and never resolve on its own.