One side of my nose has been blocked for the better part of a month now, and my left eye has been watering for about the same amount of time. I haven t been able to taste much either. The nasal blockage is more noticable on exhale. I have asthma and allergies , and take Zyrtec daily. I don t think this is due to allergies, I don t have a runny nose or sneezing , or increased wheezing . Any ideas?