When your body produces extra secretions, these secretions enter the throat from the back of your nose instead of entering the nose, which prevents the flow of these secretions.,fa. The reason for this problem can be colds, allergies, side effects of drugs, nasal arousal or polyps.,fa. If deviation of nose or polyps is the main cause of this disorder, then the treatment is nose surgery, septoplasty or polyp surgery.,fa. But if the problem is drawn from another place, it can be treated by referring to an otolaryngologist and drug intake.,fa.