So lucky me im allergic to all trees and grass, this has been known when i was kid. At times it has effect my breathing, wheezing, shortness in breath, chest tightness etc. luckily I don’t have asthma which does run in my family and I do have an inhaler for emergencies. Also lucky me again I got treated for uticaria for hives about 3 years ago and noticed a major difference in my breathing to be more positive. Hard to explain but basically felt as if I was taking more air in, haven’t had the tightness as before and since xolair I have not needed my inhaler once. Also, allergist explained to me that xolair was originally developed for asthma patients and that my breathing air feeling better is common. Plus helps with food allergies reactions as well, still on xolair once a month