Patients with a cough can really aggravate their cough if they eat too many sweets because eating foods that are too sweet can cause phlegm to be produced. The increased production of phlegm can cause the cough to linger or worsen. Therefore, when you have a cough, it is important to pay attention to your diet by eating well-digested and nutritious foods, such as lean vegetable porridge, tomato and egg noodles, vegetable noodles and egg custard, which are easy to digest and nutritious. It is also important to avoid cold, greasy, spicy and stimulating foods, such as spicy hotpot, spicy pot, ice cream and fatty meat, and to avoid overeating. When you have a cough, you should also be careful not to eat foods that are too sweet or too salty, which also tend to produce phlegm.