I currently have a back ache, and I was thinking back to a few days ago when my teacher said the most painful "aches" (I honestly don't know, I couldn't hear him properly) was backache, neck ache, and he either said headache or stomach ache. In my opinion (this is hard), it's a tie between headache and backache. Both of those can be so painful for me to the point where I can't do anything, but only when it's really bad though. I'd just say headaches since I've had more severe headaches then backaches, and because of suicide headaches (If you don't know what it is, please look it up Wooh education hahaha.....)
Mods, feel free to close it if you feel this is inappropriate discussion.
Mods, feel free to close it if you feel this is inappropriate discussion.