By the time your child is two you may actually feel like an expert in children's health. Between the shots, the well-baby checks, and the emergencies, you probably have the pediatrician's phone number programmed into your brain as well as cell phone. Chances are you've learned the difference between a cough caused by your child's inability to blow his nose and a see-the-doctor cough. Being a “nurse” is just one of the responsibilities that fall under the parent's job description.