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Our LO had FPIES, which is non-IgE, so it might be a little different (the may not go as far as doing patch testing (APT) on your LO) but he had RAST blood testing done, which is a regular blood draw, by GI before we saw the allergist. Then because of the FPIES dx they wanted to do APT, but our allergist will not place a patch if the child is IgE to an allergen, so we had skin prick testing (SPT) done first. The SPT was done at our first appointment and APT was set up for a few weeks later. SPT was done down the arm at that age and APT in the back.

Our second had suspected FPIES and for her we only had SPT done at her first allergy appointment. We were going to do APT, but decided against it because she is sensitive to adhesives. We have also tossed around having SPT done for vaccines for her, which I didn't realize they could do, but have not done them.

I think questions depend on what the results are. I would want to know if they required and epi pen and all the info regarding when/how to give it, foods/products to avoid, if you need to avoid related foods etc. Basically ask anything that comes to mind. Our allergist always gave her email out too to ask further questions as they came, so maybe see if that is an option. It was always faster than dealing with the front desk. She even called on a holiday before.

ETA: DS was 6 mo when he had RAST done and 7 mo when he had patch. DD was around 3 mo when she had hers. Our allergist would not do treatment for suspected sessional allergies for her at that age though.

My LO was tested around 9 months (little marks on back) it didn't bother her, she would just glare at the nurse every time she did it, didn't hurt enough to cry. At 3 months I would be shocked if they would do it, ours only did it at 9 months after a scope confirmed allergy cells in the esophagus and they felt it was necessary to find out what it causing these.

After we deteremined allergens they did blood test and then a food test in office to judge her reaction. this was over a course of several months that we still had issues. My daughter had loss of weight due to her projectile vomit and she was on Allimentum formula. I think you guys have quite a bit to go before testing will be required.

My son, Xander, had a skin prick test at 8 months to confirm an allergy. He had an allergic reaction to yogurt and then a dairy-based formula, so we were already pretty sure he was allergic to milk, so that was all he was tested for, just to confirm it. It was a skin prick test where they pricked his back with nothing, a histamine, and milk and then after 5-20 minutes, checked the results. I held him to my chest during it and he fell asleep. But some kids don't like being pricked and don't react well.

I'm guessing your allergist won't do that though since you don't have a specific food you're suspicious of and your child is so young.

Not sure this will help you, but our dermatologist for Xander didn't think his eczema was necessarily due to his allergies. I didn't change my diet while breastfeeding him despite the fact he had eczema and was allergic to milk.