Bailey has had excema since he was 7 weeks old and luckily as he has got older it doesn't seem to bother him as much anymore, but I consistently use HAMILTON EXCEMA CREAM and HAMILTON BATH OIL for excema, chicken pox, nappy rash etc. It works really well. You can buy it from most chemists. When it is really bad I go to the doc for Predisone cream but I only use it for one-two days, it clears it up really well. I will have to find out the name for it and post back.
I also use PURITY or AMOLIN SENSITIVE washing liquid for Bailey's clothes, towels, bedsheets etc

Good luck!