I have this runny nose and sneezing mostly every morning especially if i am tired. sometimes it occurs even when i am not tired. ?

AM Rhinitis: Morning nasal symptoms, such as sneezing and runny nose, can be due to nonallergic triggers, including temperature change, but are often an indication of an allergic reaction after overnight exposure to dust mites or feathers in bedding. Dust covers on pillows and mattresses can be helpful. Also removing or cleaning carpeting may be useful. And remember to keep pets out of the bedroom.