DEAR DOCTOR K: My son was recently diagnosed with asthma. His doctor wants to put together an asthma "action plan." What is that?
DEAR READER: Asthma is a complicated and serious disease. It can behave differently from hour to hour and from day to day. A person with asthma needs a plan for what to do at each stage of the disease. I'll describe the elements of the plan in a minute, but first a little background on asthma itself.