question: I have been diagnosed with hyper-reactive airway & chemical bronchitis. I recently attended an office with an airborne irritant which caused my lips to burn, then my cheeks & eyes felt warm then burning, then voice changed, airway tightned. I went to freshaire, used hfa, symptoms lessened but lasted for 3 days. Can you recommend a kind of a face mask I can use that can eliminate all my exposure while using an O2 canula?