aplle cider venigar hurts and stops itch, so put a bit, as long as he's not screaming, if he has scratched, it hurts with a little bit in it. put a bit olive oil diluted with cooked cold water on him, so the open wound would heal.also the oil will hold the powder longer on the excema. you could make a very thin paste and put on him if he has many ezxema. all theses things helped the itch a lot and help healing. They're all mild and safe.the skin will reject it right away if too much for it. don't expect the ezxema goes away in a couple days with mild method, but if you see improvement, keep going, once it's gone, it will not come back again too soon. It'll come back unless you detox. This is a topic I'm just starting.
Drink a lot of water.
Good luck!