If you are coughing and sneezing a lot, this will tell you that you are near something that you have an allergy towards. Another thing is that if you were to eat something and your face and throat start to swell up, whatever you ate you are allergic to that food.
If you have a neti pot near you or try to figure out what you are allergic to by just being near it. If you don't feel well, you might be near something your allergic to. Or you may just be getting sick.
No treatment for fully curing allergies. But you can stop an allergy from killing you with an epee pen, neti pot or something different that you could use.