Help Your Teen Manage Asthma Having asthma isn’t easy, and for most kids, neither is being a teen. Here are some common teen issues and suggestions for easing your child’s concerns. Your Child's Asthma: Nebulizer Treatments Breathing the medication straight into the lungs works better and faster than taking the medication by mouth. Nebulizer treatments take about 15 to 20 minutes. Your Child's Asthma: Peak Flow Meters, Oximeters, and Spirometers These three types of tools are used to measure how well your child's asthma is under control.