Asthma is a chronic (long-term, ongoing) inflammation of the breathing passages (bronchi) of the lungs. The inflammation irritates the airway, causing breathing problems. Asthma is triggered by external factors or specific situations. When a person with asthma is exposed to one of his or her triggers, the inflammation worsens and symptoms ensue. Most people with asthma have sudden attacks or periods of bothersome or severe symptoms separated by periods of mild symptoms or no symptoms at all.
Occupational asthma is caused by exposure to a trigger in the workplace. The list of known triggers is long and varied, although they are generally substances that are inhaled.
There’s no special asthma diet. We don’t know of any foods that reduce the airway inflammation of asthma. Beverages that contain caffeine provide a slight amount of bronchodilation for an hour or two, but taking a rescue inhaler is much more effective for the temporary relief of asthma symptoms.
However, a good diet is an important part of your overall asthma treatment plan. Just like regular exercise, a healthy diet is good for everyone. That goes for people with asthma, too. Obesity is associated...
Contaminants in the air such as smoke, chemicals, vapors (gases), fumes, dust, or other particles
Respiratory infections, such as colds and flu (viruses)
Allergens in the air such as molds, animal dander, and pollen
Occupational asthma can occur in almost any line of work or any work environment, including offices, stores, hospitals, and medical facilities.
Two types of occupational asthma attacks occur.
Aggravation of preexisting asthma: This is by far the most common type. Over time, with regular exposure, you develop hypersensitivity to the trigger. With this underlying asthma, continued exposure to the trigger causes attacks.
Irritant asthma: Exposure to certain substances or conditions in the workplace irritates the airways, causing immediate symptoms. Although this is not an allergic-type reaction, the irritation may cause allergy-like or asthma-like symptoms.
Once the attack is triggered, the airways begin to swell and tighten (bronchospasm) and secrete large amounts of mucus. The swelling and extra mucus partially block, or obstruct, the airways. This makes it more difficult to push air out of your lungs (exhale).
Early recognition and avoidance of the asthma trigger is particularly important in occupational asthma.
Because people spend so much time at work, those with occupational asthma tend to have extensive exposure to their trigger by the time the cause of the symptoms is recognized as asthma. The more time you spend exposed to your trigger, the more likely you are to have permanent lung inflammation and airway hypersensitivity.
Occupational asthma is the most common work-related lung disease in developed countries. In up to 15% of people with asthma in the United States, the condition is at least partly related to their work.