You need to find the cause of cough and runny nose first, and then treat the symptoms. 1. You need to go to the hospital for blood tests to check the routine blood count and C-reactive protein, and then use medication according to the test results. 2. If the cough and runny nose are caused by a virus, you can take symptomatic medication to improve the symptoms of cough and runny nose. You can also take some Chinese medicine to clear heat and detoxify the toxin. 3. If the cough and runny nose are caused by bacteria, you can take some antibiotics as well as Chinese herbal medicines for clearing heat and detoxifying the toxins, which also require symptomatic treatment. 4. If it is due to bronchitis, acute and chronic pharyngitis, you can take some antispasmodic and anti-cough medicines and seek professional medical help. 5, after the appearance of cough, runny nose need to pay more attention to diet, can eat some light food, can not eat too greasy, too hard, too salty, too sweet, too spicy food, usually also need to drink more water. 6, usually also need to strengthen exercise, which also helps to prevent the attack of the disease. 7.If a child has a cough and runny nose, he or she should not go to a place with a lot of people. You also need to pay more attention to keeping your child warm and eating a light diet. If the cough and runny nose is more serious, you need to go to the hospital in time.