I am experiencing a throbbing pain from deep within my left nostril. It throbs about once every 30-45 second and last for two or 3. It is a similar feeling to what you experience right before sneezing, but more uncomfortable. It has been accompanied by an extremely runny nose. Although I suffer from regular allergies, I do not experience runny noses like this except at the start of spring. It has not been responding to increased allergy medication (I take Loratadine = Claratin).