question: I read that Allergens can cause sinus infections. I keep getting head colds, sinus infections, last was upper respitory. Now another sinus thing. I've come to believe I have an allergy to sewing fabric. I worked on a project over the weekend and got a little itchy so I washed the second project.  Wondering if my sinus thing is related to this type of allergy? I would think not that would only cause a rash, but once I had an allergic reaction so bad I was in the hospital multiple times and they said it was so sever that I must have ingested whatever was causing it. Only later did I realize it had to be the quilt I was continually working on.