Does this look like Eczema?

Ningal
Does this look like Eczema to you? It feels dry and is red. Located in the creases of his leg. I noticed a small patch months ago but thought it was nothing but the. I just saw a larger patch as pictured and started to get worried. Will call his doctor. He's breastfed baby and I randomly give him formula if my supply runs low. I started solids 4 weeks ago.