Asthma is a chronic condition that affects the airways, causing them to become inflamed and narrow. This can lead to symptoms such as wheezing, coughing, chest tightness, and shortness of breath. 

Wheezing is a common symptom of asthma and is characterized by a high-pitched whistling sound when breathing. It can occur during both inhalation and exhalation and can be a sign of an asthma attack. 

Asthma treatment typically involves the use of inhalers, which deliver medication directly to the lungs. These medications help to reduce inflammation and open up the airways, making it easier to breathe. 

The causes of asthma are not fully understood, but it is believed to be a combination of genetic and environmental factors. Some common triggers include allergies, respiratory infections, exercise, and exposure to irritants such as smoke or pollution. 

There are several types of asthma, including allergic asthma, which is triggered by exposure to allergens such as pollen or pet dander; exercise-induced asthma, which is triggered by physical activity; and occupational asthma, which is caused by exposure to workplace irritants.