Most patients with cough and phlegm can eat beef, but if the patient has beef allergy or cough caused by allergy, it is not recommended to eat beef. Generally, coughing and phlegm are caused by infectious diseases. Increasing the immunity of the organism is beneficial to the recovery of the disease. The nutritional value of beef is relatively high, and beef is rich in protein and also contains vitamins and some minerals, such as iron, magnesium and zinc, etc. Beef is more conducive to the absorption of the body, which can increase the immunity of the organism and increase its resistance to disease, and is suitable for patients with infectious diseases. Beef is mainly cooked by stewing and boiling, and it is not recommended to bake or smoke. Patients who are allergic to beef definitely cannot eat beef, and if the cough and phlegm caused by allergic diseases, some patients who eat beef may aggravate the symptoms of coughing, so it is not recommended to eat beef during coughing.