Hi Hazel,

I am not a dentist, but it makes logical sense to me that the answer to your question is yes, the upper denture rubbing against you upper gums are in an area near your sinuses, so it would seem logical there could be a connection, but unless you hear from a dental expert on here, please make a appointment with the doctor or professional who made or fitted your dentures, because you need them redone to fit better. You shouldn't have to live in pain.