Not every person with asthma has the same symptoms in the same way. You may not have all of these symptoms, or you may have different symptoms at different times. Your symptoms may also vary from one asthma attack to the next, being mild during one asthma attack and severe during another.
Occupational asthma is asthma caused by, or worsened by, exposure to substances in the workplace. These substances may cause asthma in one of 3 ways:
An allergic reaction (like people with allergies who develop allergic asthma)
An irritant reaction (like a person that reacts to smoking with asthma)
A reaction which results in chemicals that occur naturally in the body, building up in the lung and resulting in an asthma attack
Examples of occupational asthma -- also called work-...
Some people with asthma may go for extended periods without having any symptoms but experience periodic worsening of their symptoms in the form of asthma attacks; others have some symptoms every day. In addition, some people with asthma may only have symptoms during exercise or when they are exposed to allergy-causing substances or viral infections like colds. Some people might have multiple triggers for their asthma attacks.
Mild asthma attacks are generally more common. Usually, the airways open up within a few minutes to a few hours after using a rescue medication and addressing the trigger. Severe attacks are less common but last longer and often require immediate medical help. It is important to recognize and treat even mild symptoms to help you prevent severe episodes, keep asthma under better control, and prevent a mild attack from developing into a severe one.
Are There Early Signs of an Asthma Attack?
Early warning signs are changes that happen just before or at the very beginning of an asthma attack. These changes start before the well-known symptoms of asthma and are the earliest signs that your asthma is worsening.
In general, these signs are not severe enough to stop you from going about your daily activities. But by recognizing these signs, you can stop an asthma attack or prevent one from getting worse. Early warning signs include: