For the past year, I have been suffering from sudden bouts of sneezing experienced from time to time. I tend to get itchy and watery eyes with the sneezes continuing for several minutes. This seems to be an allergic reaction but I am not sure what I am allergic to. I also catch a cold easily and frequently and get a runny nose which gets fine after around 24 hours. These extreme reactions to small changes in temperature are making it tough for me to travel. I also experience dry mouth especially after waking up. Can you please suggest how to go forward on this?