Apples do not have the effect of relieving cough and phlegm. Apples are just a fruit, and cough and phlegm itself is a drug in response to the disease, the effect will be played, and no food itself does not have medicinal effects, so apples can not be cough and phlegm. Apple itself is a fruit with a certain nutritional value, contains a variety of nutrients on the health of the body has a certain benefit, you can eat more. Cough and phlegm can be caused by many reasons, such as bronchitis, tuberculosis, lung tumors, reflux esophageal disease, acute left heart failure and other diseases, you need to first clarify the cause of the disease, the cause of the treatment, such as bronchitis using antibiotics, and then symptomatic treatment, the use of cough and phlegm medication, such as carboxymethyl stannum granules, licorice tablets and so on. If you are suffering from cough and phlegm because of a related disease, you should choose the right cough and phlegm medication to treat your actual physical condition and your actual illness, and do not think that you can achieve the effect of the medication by consuming a certain kind of food. If you feel unwell, you should consult a doctor and follow his instructions.