I have a very sore spot on my belly, just next to my belly button, about the size of my palm. It feels like a very bad chinese burn, like the skin is so stretched it's burning. I feel it on the outside and also under the skin. Only thing is my skin is not that stretched. Should i be worried about this at all? It's so painful i actually have to stop what i'm doing until it goes away, which can be up to an hour or more.