Keep your regular follow-up appointments. During checkups, your doctor will ask if your symptoms and peak flow have held steady, improved, or gotten worse. He or she will also ask if you have asthma attacks during exercise or at night. Your doctor may want to see how you use your peak flow meter and inhaler. This information can help your doctor know if your asthma category (link opens in new window) has changed or if you need to change medicines or doses.