My worst pain ever was [very badly] dislocated shoulder joint....after 3 hours when it was finally put back and I could think straight again I asked the doctor what was that magical substance they put in my blood prior to adjusting the joint which removed all the pain within seconds after the administration, he said it was morphine. Surprised I asked "Isn't morphine reserved for really terrible pain?" - I was thinking Hollywood movies where people getting shot at get a shot of morphine:) and also cancer patients.
He said "You have just experienced for 3 hours one of the top 3 most painful conditions in "every day" medicine [thus excluding accidents/wars etc. where bits and pieces of you are being shot at/cut off/smashed/ruptured/squashed] "..."What are the other two?"..
I hope I'll never have to experience the stones for the purpose of comparison! Giving birth is fortunately excluded due to gender...phew!