What's this?

Moms I need help.. What is this on my baby's skin? Is this atopic dermatitis, seborrheic dermatitis or what? It would be such great help if someone here knows and have experienced this with their baby. It would save us from having to go to a dermatologist clinic. Symptoms are red moist itchy patches behind her ears and on her neck. I am currently using Johnsons baby bath, do you think it's too harsh for my baby? What product is the best for this type of skin? #advicepls #1stimemom #momcommunity