There are four levels of asthma, based on how severe it is. How often you have symptoms and your lung function determines how bad your asthma is. Your doctor will ask you questions about how often you have symptoms and wake up at night from coughing or trouble breathing. They might also ask how often you have trouble doing normal activities or use a rescue inhaler.
Intermittent Asthma — You have symptoms less than twice a week and wake up less than two nights a month.
Mild Persistent Asthma — You have symptoms two or more days a week and wake up three to four nights a month.
Moderate Persistent Asthma — You have symptoms at least every day and wake up one or more nights a week.
Severe Persistent Asthma — You have symptoms during the day and wake up every night due to asthma