Ok this is going to sound strange but soap and sugar get a bar of soap cut it into fine pieces mix sugar into it and put it in the microwave till its soft and like a spread put it on the belly button and the ring and put a bandaide over it and you will find it will clear up in a day my sister had the same thing we call it the witch medicine hehe my nana always made us put it on our sores and everything

P.s you only need a tablespoon of soap and a table spoon of sugar don't use liquid soap