RAST blood tests for allergies

[AppleYumYum]

I've got a paediatrician appointment tomorrow for my 9 mth old with awful eczema and reactions so far to cows milk, salmon and quite badly to houmous with his lips swelling up (suspect it was the sesame in it).

My other dc has a CMPA and was only offered skin prick tests. Since doing some reading I would like to have the blood tests done tomorrow as I think he possibly has other allergies and I'm worried about peanuts now as I read that children that have peanut allergies are more likely to have a sesame allergy. I'm feel a bit scared about him to be honest.

Are they reluctant in anyone's experience to offer the RAST tests on the NHS, perhaps they're expensive? Do you have to push? I know they can give false positives but apparently in under 3s they are quite accurate?

[ChangeYouFucker]

My DS has had blood tests a number of times (don't think they use RASt any longer but I can't remember what it's called). He is only just 2. No problems getting them but he has multiple allergies and it was quiet obvious he did.