How asthma is classified To classify your asthma severity, your doctor will consider how often you have signs and symptoms and how severe they are. Your doctor will also consider the results of your physical exam and diagnostic tests. Determining your asthma severity helps your doctor choose the best treatment., Asthma is an inflammatory lung disease that can cause mild to severe symptoms. In most cases, avoiding triggers, taking daily medications, and using other treatment options can help you manage , Severe asthma attacks can cause life threatening symptoms and require immediate medical treatment. Symptoms, which may start mild, can develop into worsening chest tightness, fast breathing, and , , , .