Colds with frequent runny nose are caused by viral infections, while not excluding the possibility of their own rhinitis. Frequent runny nose after a cold is mainly caused by viral infection. Colds are usually caused by viral infections, viruses can enter the nasal cavity through the respiratory tract, resulting in damage to the mucous membrane of the nasal cavity, the secretion increased significantly, manifested in frequent runny nose symptoms. But if by drinking more water and other measures, or after 1 week, the symptoms of runny nose relief is not obvious, then do not rule out the possibility of their own rhinitis disease. Rhinitis can be caused by inflammation affecting the mucous membrane of the nasal cavity, resulting in long-term frequent runny nose and sneezing symptoms. Therefore, it is recommended to consult a doctor in time for examination and treatment under the doctor’s guidance.