Why does my body heat up and get sweaty when I'm hungry? It starts from my lower back...?? I get instantly starved and my stomach feels like a fire ball i struggle to eat as I very rarely get a nice normal hunger pain it's either sickness, overheating, or instant starvation Ive triedI told you before im tired if bein strong  to read up on eating disorders but they are all about people who think they are fat what about people who think they are too skinny and would love to be able to finish and enjoy a decent meal!!