Sinusitis old runny nose, is a normal manifestation of sinusitis, due to inflammation leading to increased secretions, sinusitis is mainly caused by infectious factors, allergies and so on. 1. Infectious factors: bacteria, viruses and other pathogens invade the sinuses, due to the stimulation of the mucous membrane in the nasal cavity, which can cause vasodilatation of the nasal mucous membrane, increased secretion, increased permeability, and therefore can be manifested in sinusitis with a runny nose. 2. Allergic factors: if sinusitis is accompanied by allergic rhinitis and asthma, the daily contact with allergic substances will also cause excessive secretion of the sinus mucosa, and the phenomenon of a runny nose, which is usually alleviated after being away from allergens. In addition, nasal obstruction causes, such as nasal polyps, turbinate hypertrophy, nasal stones, nasal septum deviation, nasal tumors, etc., because of the obstruction of nasal sinus ventilation and drainage, is also an important cause of sinusitis. Sinusitis old runny nose, it is recommended that patients go to the hospital in a timely manner after a systematic examination to determine the cause of the disease, follow the doctor’s instructions to take standardized treatment, do not ignore the symptoms, to take it lightly.