What would cause my nose to be stuffy most of the time?

Several causes. There are several causes for stuffy nose. See an ENT to rule out physical causes like DNS or polyps, chronic sinusitis etc. if he cannot find the cause then we look at from allergy point of view. Please visit us www.ehacstl.com to learn how treating the causes helps relieving nasal congestion and reduces for antihistamines and decongestants .