A runny nose every morning may be related to physiological factors, or it may be caused by allergic rhinitis, chronic rhinitis-sinusitis and other reasons. 1. Physiological factors: Commonly found in cold winter, if there is no heating equipment in the bedroom, due to the low indoor temperature, after getting up in the morning, by the cold air stimulation, it may cause the phenomenon of runny nose every morning, which is a normal physiological response, can be intervened by raising the indoor temperature and other ways. 2. Allergic rhinitis: If there is a history of allergic rhinitis, it will lead to an increase in the sensitivity of the nasal mucosa, and the secretion of the nasal cavity will increase, which will lead to the symptom of a runny nose, especially after waking up in the morning, stimulated by cold air and allergens, which may lead to the phenomenon of a runny nose every morning. 3. Chronic rhinitis and sinusitis: due to the presence of inflammatory reactions in the nasal cavity and sinus area, the stimulation of inflammatory products leads to an increase in nasal secretions, thus showing the symptoms of a runny nose. When the patient wakes up in the morning, along with a change in body position, it is easy to prompt the secretion to flow out on its own, which will result in a runny nose every morning. If you have a runny nose in the morning, you should seek medical advice as soon as possible to make a clear diagnosis and get treatment under your doctor’s supervision.