Sure, nobody dies of seasonal allergies, Untreated allergies can lead to what are allergies sleep apnea, chronic sinus problems, recurrent ear problems (especially in children), loss of sleep, and asthma. Usually a last resort, immunotherapy involves getting weekly shots that immunize you from what you’re allergic to. What’s going on? In addition, spring came late this year. Try staying indoors when pollen is the highest. For more tenacious sinus trouble. Fight back; get more help.