[anonymously]

Please use the search engine here, type in “allergies” and see my posts.
/forums/search/allergies/

Mail-in hair and saliva tests are inaccurate, they do not test for allergies. Food sensitivities fluctuate and they do not cause the symptoms you describe. Food allergies are rare.

I would make an appointment with a dermatologist as soon as possible.
Any more questions?

You may find this site helpful http://skeptvet.com/Blog/?s=allergies