I might have some possible chronic sinusitis and trying to understand if it can be a deal breaker for a 3rd class medical certificate. I'm generally healthy, I don't take prescriptions, and I have no symptoms on my day to day life. At 4 years old I had a surgery for nasal polyp removal. I'm close to 40 years old now. I have experienced sinus discomfort and pain in the eyebrow area in the following cases: SCUBA diving - I could not equalize and go down more than a few meters During descent on an airliner - it happened only a few times on short hops During rapid descent on a flight lesson - it happened once but it was only discomfort, not pain I don't have any discomfort or other symptoms on my day to day life. I discussed this with my primary care physician and I had a sinus CT scan done. She said I might have chronic sinusitis and that I've been living with it for my whole life without realizing. She said it could be due to allergies. She prescribed me a trial of PredniSONE tablets and Fluticasone spray. If they help I will sleep better. I generally sleep OK, so it is hard to tell if they are helping or not. I know that chronic sinusitis is a deal breaker, even for a 3rd class medical certificate, but is my situation falling in this category? What are my options? Thanks!