Thrush are white patches often on the tongue, roof and inside of the cheeks. This does not look like teething to me either. Have you brought him to see a PD? Better do since he drank less milk for more than a month already
The white part looks like teeth that hasn't surfaced yet. Your baby could be teething. Oral thrush would be white patches on the tongue. Try giving him some chewing toy or teether to soothe him.
https://sg.theasianparent.com/oral-thrush-in-babies
it looks like teething to me
Anonymous