SusanaD ah hadn't heard of Stelatria very interesting though.
The only testing we've had done are blood tests as I believe skin patch testing is not used on babies/toddlers, although I guess this may be different in different areas and with different allergies.
We initially saw a paediatric immunology consultant privately when DS was 3mos no testing just a general assessment of his symptoms and family history, he was in no doubt that he had a dairy allergy. We had been getting the run around by HVs and GP before and this was the kick up the bum that our GP needed because we were then referred to see a dietician as I needed an exclusion diet and DS needed to be under the dietician (NICE guidelines insist on this). I suspect you are at the same stage - trying different creams to find the right one but I knew something wasn't right because DD had had 'normal' eczema and this was not the same.
Our dietician then got us into the NHS system under a consultant who did blood tests sometime around 6mos although not before he had touched wheat and his face and lips swelled up and he was covered in hives (just from touching it)
. They then tested for the common food allergens dairy, wheat, egg, peanut, shellfish, soya and he was allergic to them all except shellfish. These are so common in children that the NHS actually have prepared leaflets for feeding children excluding these allergens.
The good news is that at 2.7 he is no longer allergic to soya and we are challenging him on dairy which is going really well. He gets blood tests once a year and sees his consultant about every 6-9mos (all NHS) and last week he said he expects him to fully grow out of them all with the possible exception of wheat because it is so severe.
What I have learnt is that you have to know your rights (NICE guidelines), you have to be prepared to make a complete nuisance of yourself with the GP, consultants etc. until they listen to you and go in armed with as much info as possible and occasionally you may need to throw some money at it, if possible, like the private consult we had at the start. Private consultants tend to be thinking less about budget and overfull clinics and more on giving you a full assessment. The sad fact is that allergy clinics up and down the country are overfull and hard to access. PLUS, if you haven't already, head on over to the allergy board there is masses of help over there.
My mantra has been I am my child's voice he cannot speak for himself so I must do everything I can to make his voice heard. I have needed to remind myself of this a lot to get things done.
Sorry it's so long but hopefully there is something here that may be helpful going forward.