My cat and I share an allergy...?

Your allergy is environmental. Some chemical that is bothering your cat is bothering you. Start at the beginning and eliminate things from you environment like room deodorizers perfume and such. You need to become the chemical detective. It it affects you both so it needs to go away. Try looking for some kind of mold . That is my trigger and my cat Saffron seems to have the same trigger. You can try children's benadryl on her when its bad. Some times when is bad I put the benadryl right on the hive. That's the itchy spot. If you use the children's liquid it won't hurt her when she licks.