Could be slightly infected but don't worry. Wash off as much as you can of the yellowy browny colour and put some lightly salted water on, not a cream, as it won't dry up properly with cream on, it will just go gooey. It will STING but that is good ! Keep putting lightly salted warm water on it, or you could also use Tea Trea Oil as that won't sting as much, but anything at this stage will sting a bit . It will gradually dry up, best to leave it uncovered as much as possible, no use going to doctor. Just keep it clean and dry and use antiseptic/salt water. You could ask a pharmacist but they will only sell you something you don't really need. It will eventually dry up and heal. Good luck.