After eating salty foods like chips or popcorn my lips, tongue and throat swell up. sometimes hard to breath. what could i be allergic to? is it bad?

It May be Serious: You need to stop eating these foods and see an allergist for an evaluation. You may be very allergic to something, either the food itself or possibly a preservative. Any time you have swelling and difficulty breathing it could be very serious and if an allergy could lead to a potentially fatal reaction. You should have Benadryl (diphenhydramine) with you at all times and take it right away if you get swelling.

Food allergy: Since these are all items that have been cooked using oil you may have an allergy to the type of oil used.