Human: How do I know when it is time to take my child to the doctor? Assistant: 
It depends on your child's age and medical history. Generally, children should see a doctor if they are experiencing any of the following symptoms: fever, vomiting or diarrhea, rash, coughing, difficulty breathing, fatigue, pain, swelling, or other unusual changes in behavior or habits. You can also consult with your doctor if you have concerns about your child's growth or development.