Postnasal drip does not usually occur without snot.
Snot is mucus that is constantly secreted by the mucous membrane of the nasal cavity. In a healthy nasal cavity, due to the thinness of the mucus, it is able to adsorb particles, full of bacteria and viruses and other harmful substances, and then transported to the pharynx and eventually into the esophagus by the cilia in a timely manner, and the whole process can not be perceived due to the thinness of the mucus, so there is no booger in the nose of a healthy nose, and there is no feeling of a foreign body, and the nose breathes smoothly and refreshingly.
The causes of post-nasal drip syndrome, such as various types of rhinitis, sinusitis, nasal polyps, etc., due to the presence of inflammation in the mucosa of the nasal cavity, resulting in an increase in secretion of snot back up to the throat, coughing, throat clearing, nasal congestion, dizziness, headache and other symptoms. There are not only symptoms of postnasal drip, but also a lot of snot blown out from the nose.
The absence of snot is not backing up into the throat to form postnasal drip, but the nasal passages are healthy. If you experience any discomfort, seek medical attention and follow your doctor’s instructions.