A baby’s cough and diarrhea may indicate that the child has a gastrointestinal cold, or digestive symptoms caused by a respiratory infection, which means that the child has problems with both the respiratory and digestive tracts, and must be treated actively. First of all, it is important to clarify whether the child’s cough is caused by a cold or by bronchitis or pneumonia. If the cough is caused by a cold, give your child plenty of fluids, no antiviral medication is needed, and cold medicine is generally not recommended. If the cough is caused by bronchitis or pneumonia, the first thing to do is to actively treat the symptoms according to the pathogen. It is generally not recommended to use expectorants to stop the cough, just drink plenty of water and pay attention to the observation. If your child has diarrhea while coughing, you should continue feeding. If your child has diarrhea for a long time, you can consider switching to diarrhea formula. If diarrhea is accompanied by a decrease in urine, oral rehydration salts must be given promptly to prevent dehydration. If the child cannot receive oral rehydration salts, other liquids can be used to ensure the amount of intake. If the child has pus and blood stools with more mucus, it is important to consider that the child has a respiratory infection combined with bacterial diarrhea. This will require active treatment with appropriate antibiotics and may require infusion for serious infections. A baby with cough and diarrhea indicates that there are problems in the respiratory and digestive tracts. On the basis of controlling the infection, symptomatic treatment must be actively carried out.