Girls, is it an allergy? At first there was flaky skin on his chin, th…

Girls, is it an allergy? At first there was flaky skin on his chin, the child had profuse saliva, and he smeared with baby cream and Emolient - it didn't help. I thought maybe if the teeth might be the cause and the saliva flows out because of these constant droolings, irritation on the beard. The saliva stopped flowing, but now from the chin it went to the cheeks... Again, I smear every day with cream, and chamomile decoction - it doesn't go away? And now I think that it's an allergy or atophic dermatitis. But if it's an allergy - then we haven't introduced any new products...