Just because you have symptoms of asthma, such as wheezing, coughing, or difficulty breathing does not mean that you have asthma. Other health conditions have symptoms that may mimic asthma symptoms. Let’s look at some common "asthma mimics."
Recording this information will help you recognize asthma attacks and head them off before you become seriously ill. Your doctor will also use this diary to evaluate how well your asthma action plan is working.
If the highest PEF reading is less than 80% of your personal best, you must follow the instructions given by your health care provider in your asthma action plan. Also remember to check PEFs more frequently that day, including an evening PEF.