Patients with colds and flu are usually able to eat sugar appropriately without adverse effects on their condition. If the patient has a lot of phlegm or has diabetes, he or she should not eat sugar. For cold and flu patients, during the period of illness can be appropriate to eat sugar, generally will not aggravate the condition or induce the body to appear uncomfortable symptoms, but on the large number of food should be avoided, so as not to increase the feeling of foreign body in the throat, affecting their own comfort. If the patient himself exists underlying diseases, such as diabetes, more can not eat sugar, easy to make the body blood sugar value rise, is not conducive to the control of the disease. It is recommended that cold and flu patients pay attention to the rationality of the diet, to light, easy to digest food, such as milk, eggs and so on. If the symptoms fail to improve or even gradually aggravate, it is necessary to consult a regular hospital in a timely manner, and cooperate with the doctor to improve the examination and standardized treatment.