A ten minute "hydrating" session once or even twice a day in warm water, after which you slather on the oil or lotion can help the dry skin. But in my experience, what really got rid of the ezcema on my dd was changing my diet (she is exclusively breastfed). I went on a strict elimination diet for about 8 weeks. At about 6 weeks was when her face really started to clear. I eliminated gluten, sugar, chocolate, eggs, dairy, tree nuts, nightshades, citrus, soy, and in terms of meats only ate turkey, chicken, lamb and game meat. I also was dedicated to taking good oils-Omega 3's and probiotics. I also gave dd probiotics once a day. Before my diet, even the 1% hydrocortisone didn't make the ezcema go away, it just kept it from exploding. Then we started going to an NMT practitioner. She prescribed Chinese pearl powder cream (made of crushed abalone shells) to use instead of the hydrocortisone and that stuff is amazing.
At this point, I think what really aggravates her is my eating too much of anything processed-white sugar, flour, and pasteurized diary. Some people think this could be related to yeast overgrowth. I'm not sure if it is that or just a build up of toxins. Her skin will look like it is going to break out, but now it goes away overnight.
Something you can do to relieve the itching at night is to sew the sleeves shut on his pjs. It is best if you turn them inside out so the seam will be on the inside of the pjs-then the most scratchy part is inside rather than out.