Unconscious runny nose in the elderly may be related to allergic rhinitis, upper respiratory tract infection, vasomotor rhinitis and other factors. It is recommended that patients go to the hospital in time and choose the treatment according to the cause of the disease. 1. Allergic rhinitis: generally there may be dryness in the nose, itchiness, nasal congestion, watery nasal discharge, decreased sense of smell and other symptoms. Physiologic saline can be used to rinse the nasal cavity, and anti-allergic drugs such as levocabastine hydrochloride, cetirizine, and loratadine can also be used to relieve symptoms. 2. Upper respiratory tract infection: sneezing, nasal congestion, watery nasal discharge, sore throat, cough, fever and other symptoms. Patients with mild disease can be treated by drinking more water, paying attention to rest and preventing cold. Patients with symptoms such as excessive runny nose can use drugs such as chlorpheniramine maleate and diphenhydramine to relieve symptoms. 3. Vasomotor rhinitis: mental tension, anxiety, sudden changes in environmental temperature, endocrine dysfunction can cause excessive release of parasympathetic neurotransmitters or non-specific release of histamine, vasodilatation, increased secretion of glands, and runny nose. Treatment is based on topical medications, including nasal glucocorticoids, antihistamines, and anticholinergics. All of the above drugs need to be used under the guidance of a doctor. There are other possibilities for involuntary runny nose in the elderly, such as vasomotor rhinitis, and it is recommended to consult a doctor in time for standardized treatment.