Eggplant root boiled in water can treat general coughs, but severe coughs require further evidence-based treatment. Eggplant is best in autumn, as it corresponds to the natural autumn season, and it can purify the lung qi, lowering heat and removing fire. Eggplant itself is sweet, light and calm, and Chinese medicine believes that light seepage and calmness can play a role in moistening the lungs and relieving coughs, especially good for coughs in the dry climate of autumn. For cough aggravation caused by various respiratory diseases, such as bronchitis, pneumonia, tuberculosis, lung cancer, bronchiectasis, old chronic bronchitis, emphysema and other conditions, the dietary treatment of eggplant root boiled in water can only be used as an aid and must be combined with Chinese and Western medicine prescriptions for evidence-based treatment, and in severe cases, hospitalization for observation and treatment is required.