<s>[INST] I have a, for lack of a better word, Lump in my belly button and it smells horrific, I try and clean it every day with peroxcide and a q-tip but after 4 months+ of doing this it still hasnt gone away or changed at all, I was wondering if it was something serious? [/INST] Hi. Yes, this can be something serious, as you have already tried something correctly. The probable diagnosis is still a deep-seated Umbilical Granuloma or Umbilical fistula which is connected to either the intestine or urinary bladder. Although this is a Congenital condition, it can manifest anytime in the lifetime. The best Way is exploratory Laparoscopy, preferably to include the examination if the umbilicus and the internal connection with any organ. And to excise the whole tract if it is present. </s>