Cough is a common symptom of respiratory diseases and can be caused by many diseases, both infectious and non-infectious. Patients with cough often need to pay attention to dietary regimen, eat less spicy and stimulating food, strengthen nutrition and increase body resistance. Fish is rich in protein and contains many minerals and other nutrients, so cough patients can eat fish to supplement their nutrition and increase their body’s resistance to disease. In addition to eating fish, patients with cough should also diagnose the cause of the cough, find out the cause of the cough in time, treat the cause, and combine it with some cough and phlegm medicines for symptomatic treatment in order for the cough symptoms to improve.