There are four categories when it comes to asthma, and they are based on their severity. Asthma causes inflammation in the airway, which can make it difficult to breathe. Asthma attacks can be very severe and even life-threatening in some cases. It’s important to always have an inhaler with you to be prepared for an attack. If you think you may have asthma or notice your symptoms getting worse, visit AFC Urgent Care Bedford ...