Patients with constant runny nose are often the cause of acute rhinitis or allergic rhinitis, as follows: 1. Acute rhinitis: Patients may suffer from cold or suffer from respiratory viral infections, causing the onset of acute rhinitis symptoms. The patient may experience nasal congestion, sneezing, runny nose and other related symptoms, and may further experience generalized discomfort such as chills and fever. 2. Allergic rhinitis: Some patients may experience episodes of allergic rhinitis due to exposure of the nasal mucosa to various polluting and allergenic substances in the environment. Patients may also experience symptoms of itchy nose, sneezing, more clear water nasal discharge, and may also be accompanied by itchy eyes and tearing performance. If necessary, further detailed examination is needed to clarify the cause and take targeted treatment improvement measures.