A: You can eat sugar cane if you cough with phlegm. Cough is a protective reflex action to clear secretions or foreign bodies in the respiratory tract. Although it has its advantages, severe and long-term cough can lead to respiratory bleeding. There are many reasons for cough, such as irritating cough and cough caused by inflammation. It is necessary to test blood routine, make a chest film and see if there is congestion in the pharynx. If it is caused by inflammation, it is necessary to actively control infection with antibiotics. Sugarcane has the function of resolving phlegm and relieving cough, which is helpful for the treatment of cough.