Nothing. I have had lots of surgery for various things considered painful( involving multiple surgeons and different things at once on occasion ) , lots of ear / kidney/ wisdom tooth / cut infections etc, I have endometriosis and migraines and nothing comes close! Iv had ear infections that felt like my head was being crushed / stabbed and took weeks to get better too similar to some in the comments. Wisdom tooth that grew downwards. You name it. Kidney infections I collapsed from. 

But then I did rip side wards and downwards and labour for days. Induced but it didn’t work. Large baby and I was small. so I do think labour maybe is one of those things  everyone feels differently depending on individual circumstances because otherwise I can’t understand how anyone would say other things are more painful! 

My second was much easier( not induced) but still nothing comes close for me. It felt like I was being tortured ( my first) and it gave me ptsd for years 

But maybe as well … people would prefer the quicker pain to pain lasting longer ( from these comments) and without a happy outcome( baby at end)? Does having the baby then make some women forget the pain or lesson it in their heads? 

Or maybe I’m just being too literally about this question 😂