You need to know your personal best peak flow number to help control your asthma. This calculator will determine your Green, Yellow and Red Zones, based on your personal best peak flow number.
People who face an emotional upheaval such as the death of a loved one or the loss of a job may have difficulty dealing with their asthma symptoms, says a 2007 study in the journal Thorax. They may view their asthma symptoms as getting worse even if they aren't. This result is especially true among people with lower incomes, the researchers say.