Eczema

It seems like my 3 year old has eczema, I mean I always kinda questioned it because he would get dry bumpy patched on his legs, stomach, and back. But we also live in a very dry state that gets pretty cold so I always thought it had to do weather changes. But the way it was I also assumed a slight case of eczema so we use the aveeno eczema lotion which seems to help.

But the other day he broke out really bad all over his hand and wrists kinda going up his arms. I don't even know what would have caused this flare up. So I've been putting the lotion on it which it does seem to be helping. It's not as red anymore. But now I'm just curious if I should take him to be seen by his pediatrician? Does this stuff go away? Is there something better I could use? No one in our family deals with eczema so this is all new to me!