Can sinutitis cause sore throat and swallow difficulty?

Yes: The bacteria or virus that affect your sinuses could affect your throat. Also, your nose produces a liter of post-nasal drainage a day in its attempts to cleans the air we breathe, preparing it for the lungs, by the sweeping mechanism of the cilia of the nasal lining. The cilia sweep the secretions back to the throat so your throat can get irritated, causing trouble swallowing.