Help!

Candice

My 2 week olds belly button is red, full of pus and smells awful. I’ve tried putting breastmilk on it 3 times a day with no luck. I recently switched him to size 1 pampers and they cover his belly button which is when it started looking like this so I started folding the diaper down in the front when I tie it. His umbilical cord also came off a few days ago. What do I do??