could be he is allergic to something that your feeding him..... you can start by just giving porridge with fish than wait for 2 days and keep introducing other vege or meat to your baby diet. You must wait 2 days each time you introduce anything to your baby if you notice that he starts getting rashes after eating a particular vege or meat than that might be the cause. Also you can try changing milk brand and see if the rashes subsides. Side note you hv such a cute baby
My little brother have too last time but I’m sure it ok because after that mine little brother didn’t put anything it will go away by itself just make sure it clean over therr