To make things even more complicated, as if they are not already complicated enough. I have chronic congestion, sneezing, and a runny nose and have for years. I think I have Nonallergic rhinitis.
Nonallergic rhinitis doesn't involve the immune system. Yet causes sneezing, congestion, and a runny nose just like a cold, a flu, or a true allergy.
Same here. I have both allergic and non allergic. With the latter my nose gets clogged up feeling not runny. Happens many times throughout the day from various triggers. Primarily one sided (left).