We’re having this at the moment and myexpertmidwife dribble defence cream is working so so well! X
I would say dribble rash or a heat rash (or both). The warmer weather with dribbling chin are a great combo for irritation. Try and dab dry rather than wipe as much as you can x
We had this too my boy ended up getting a fungal infection too due to the heat and it was right under his neck rolls. We got an antifungal cream and a really good barrier cream. I’ve also found child farm nappy cream and some barrier cream to help now that the infection has cleared but still a bit red
Looks like the dribble rash my baby gets. Going through like 10 bibs a day between the slobbers from teething and spilling milk while drinking. Trying to wash and dry it more regularly and take off milky bibs straight away for a fresh one and applying some sudocream