Diabetics generally have a lower immune system and are therefore prone to many infections, such as respiratory infections. If a diabetic patient has a cold and cough: first of all, it is important to monitor blood sugar. Because diabetics with respiratory infections generally have very high blood sugar fluctuations, either high or low blood sugar, which can easily lead to hypoglycemic coma or hyperglycemic coma. Therefore, at this time, patients are advised to pay attention to their diet, avoid taking foods that are too high and rich in sugar, and monitor their blood sugar closely. If hypoglycemia occurs, reduce the dosage of medication. If hyperglycemia occurs, the dosage of insulin or oral medication should be adjusted in a timely manner. After a cold and cough occurs, the infection should be actively controlled, and the condition should be controlled more effectively and vigorously than the average person. Be sure to check a routine blood test to see whether it is a viral or bacterial infection, and give antibiotics or antiviral drugs to treat it. Next, use cough medicine expectorant medication. At this time, avoid using sugar-rich cough or phlegm-suppressing and expectorant drugs. At this time, you can use, for example, acetylcysteine effervescent tablets, licorice tablets, and suhuang cough capsules, which do not contain sugar, and you can use these drugs for cough and expectorant treatment.