A runny nose and watery eyes can be caused by the common cold or by influenza. Most common colds are caused by infections with pathogens such as coronavirus, coxsackie virus, and rhinovirus. In the early stage, it mainly manifests nasal symptoms, such as sneezing, nasal congestion, watery nasal discharge, and may also manifest as cough, dry throat, itchy throat, etc. After 2-3 days, it may be accompanied by sore throat, headache, tearfulness, dyspnea, hoarseness, etc. It is generally self-limiting, and will be cured in 5-7 days. Influenza is mainly caused by influenza A virus, influenza B virus and other infections. Patients are mainly characterized by systemic symptoms, such as chills, high fever, headache, muscle pain, etc. Nasopharyngeal symptoms, such as runny nose, nasal congestion, tearing, conjunctival congestion, etc., may also occur. Influenza usually has more severe symptoms and requires the use of antiviral drugs such as oseltamivir at an early stage. In addition to colds that can lead to a runny nose and watery eyes, patients who develop allergic rhinitis complicated by allergic conjunctivitis will also have a runny nose and watery eyes. It is recommended that if the symptoms do not resolve or worsen, it is necessary to consult a doctor in time to clarify the cause of the disease, and the doctor will choose the appropriate measures to treat the cause.