Asthma is not a diagnosis. If you or your doctor thinks your child might have asthma, your next question should be: " "What disease is causing my child to have asthma?"" There are many diseases that cause asthma, and these diseases require different therapies. Learning what is causing your child's asthma, wheezing, or coughing is the most important step to ensure that your child receives the best treatment. Unfortunately, that first diagnostic step...