could I be allergic to yeast?

could I be allergic to yeast? I have been asking myself this question last couple of weeks. I have been always suffering from allergic rhinitis and sinusitis. Since these conditions never really bothered me or obstructed me in leading a normal life, I never paid much attention to them. But now, I think it is time I deal with this to the end.

To be honest, you should have decided that long time ago. Any condition not treated could be a possible source of many complications. Your condition is caused by allergy to microscopic fungal spores that are airborne. Since they are of microscopic proportions, they easily evade nose's defensive mechanisms; enter lungs and cause asthma or wheezing.