Blood tests can be done
Patch testing isn’t reliable
Random food panels is never recommended since they have a 50% false positive rate.
You can have idiopathic hives
Meaning hives just because it’s tursday
Pollen allergies such as grass should turn positive
They only tested her for one type of grass pollen
Here there must be at least 5-10 types of grass
The treatment is still the same
Daily Zyrtec or Allegra
If those don’t help enough
Then they add singuliar and possible allergy shots
You can be allergic to the sun
And to cold
An ice cube test done at a doctors office can tell on cold
Did she see a board certified allergist ?
Not a Gp
An allergist would not test for food unless you have seen reactions to food
Since the gold standard is eating a serving of the food without reaction in a hospital clinic
Some pollens cross react woth food and cause false positives -Ds has these and shows positives for something like 10 Foods he is not allergic to
He is only allergic to tree nuts and fish .
Typically you will get a positive test from skin or blood for pollen allergies though.
Do the hives stay in the same location (not move ) for more than 24 hours ?
You can have hives for more than 24 hours but the individual hive will disappear and a new one reappear somewhere else .
Ds doesn’t handle wool or chemical sunscreen well on certain areas
He has to use physical sunscreen (pure zinc oxide -Zinka on his entire face )
He can use a chemical version that sprays on his hands or bottom of his legs
Long rash guards shirts /big hats/swim hood etc are used to avoid the sunscreen
Wool we just avoid. Never bothered testing
Ds has severe pollen allergies so his treats were very large on his skin at age two before his body had even seen three seasons -normally your not positive till age 4
But try IgE blood tests for pollens not food and realize you may not get answers though
http://www.kidswithfoodallergies.org/page/food-allergy-topics.aspx
