marie, I will ask the lady I was talking about to pop in on this thread and let you know what dietary changes she made. I think its incredibly ignorant of the GP to say it 'probably' isn't diet related.......eczema is caused by a variety of different things and until you have worked out what seems to be the biggest culprit for setting it off then you can't rule out diet.
I had hideous eczema breakouts when I was little. It cut deep into the back of my legs and creases of my arms/wrists, eyelids. The itch was awful, i remember it well. The aqueous cream was a great moisturiser but, tbh, I used to find it made the itch worse when it was at its height as it gave my skin something else to feel yucky with. The cream would heat up with the heat of my skin and thus felt slimy and thus the itch cycle began again.
Key in treating my eczema was to keep the skin really well moisturised everyday to prevent a bad breakout. When the breakouts came I had a very mild Betnovate cream (steroid) which healed it fast. Its not healthy long term to use this cream but it is ok if it is short term, just to get the breakout under control, and then back to moisturising with aqueous or similar. Betnovate is only available on prescription.
As an adult, I still get the odd breakout (funnily enough I have one at the moment) but they are few and far between. I always have dry skin though and I should moisturise daily. I manage 2/3 times a week. Aqueous has always felt slimy on my skin and, personally, I have more joy with Aveeno which you can buy from Boots. Its smooth and feels nice on the skin. Its been hailed on MN a few times as being good for eczema.
My eczema has lessened with age. I thought I had grown out of it totally but lately its back. Its never been as bad as when I was small.
My advice would be to look at his diet. Dairy can be a problem. And to moisturise his skin as much as possible once the breakout has passed. Its totally possible to get him/keep him more comfortable than he was last night but I'm not sure you are getting the best advice/training/creams to handle it.
How was the rest of the night? And this morning?