What could this be?

Courtney • Wife 👰🏾🤵🏻 💙4/15/19 💙 8/11/20 due 9/4/22

He has always has an issue with his neck folds, they get irritated easily. This level is new. I put aloe usually however he screamed after so I cleaned it and put a&d ointment. I did this like 3 hours ago and it is less red than before HOWEVER he gets dust in there easy. I dont even have a shirt on him because of the irritation. I dont use bibs (unless he is eating food) and I keep a cloth under his mouth while he drinks milk. He does spit up while playing on his mat but I do a great job of getting to it fast.

Could this be a yeast infection? I did see what looked like dead skin flakes earlier today but I'm worried about him. He has his 4 month appt in 2 days but I thought I'd bring it to you all...