T.T.
My older son had that until he was about 2 years old and even longer in the winter months. It did get progressively better, but I had to stay on top of it to keep it in control. I found the best combo to get rid of it was hydrocortizone and Aquaphor. And Aquaphor did the best to keep it from coming back. I always applied it to his cheeks/arms and legs after every bath.
Good luck!!