The symptoms of coughing when drinking cold water usually have the following two causes: 1. It is possible that the process of drinking cold water has led to the cold water entering the trachea or bronchi, thus producing choking symptoms. Because cold water is a strong stimulus for the trachea and throat, it can stimulate the cough receptors in the airway, resulting in coughing symptoms. The cough that is produced at this time can mostly subside naturally and can generally be relieved by resting for a period of time. 2. It is possible that there is an acute inflammatory reaction in the bronchial tubes or throat itself, and drinking cold water can aggravate the irritation and thus cause coughing symptoms. In this case, you can promptly improve the laryngoscopy and blood analysis for clarification, and give the corresponding cough expectorant treatment, such as the use of dextromethorphan, aminoglutethimide hydrochloride and other drugs for treatment.