My first baby had this and doctor advised to sprinkle salt on it and within 2 days it had healed properly x
My baby has a similar belly button at the moment but looks a bit worse and the pink wet bit is actually sticking out of his belly button. My midwife advised me to let it heal on its own and if it doesn’t then the gp can cauterise it. x
Looks like umbilical granuloma, is perfectly normal and doesn't really need additional treatment, my HV said to just keep it clean and dry https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.alderhey.nhs.uk/conditions/patient-information-leaflets/gastro-oesophageal-reflux-gord/&ved=2ahUKEwiv6dSI3ueLAxUAQ0EAHYbMCtMQFnoECCIQAQ&usg=AOvVaw2LXjWghF75YaLbxLhwADSa