My baby is 6 months old and is exclusively breastfed. I just started to feed her baby food. She developed what I thought at first was cradle cap. But I don't know if it's just dry skin. It's not waxy, greasy, crusty, or yellow. It's just dry, flaky white skin. I just use shampoo but no conditioner. The dryness is just at the back of her head. I live in West Texas, the desert. Is it cradle cap or dry skin? Also, is severe generalized seborrheic dermatitis all over the body? And what is severe?