Do you know the different types of asthma? Advances in our understanding of asthma have helped experts define specific types of asthma, such as exercise-induced asthma (asthma that occurs with physical exertion) and nighttime asthma (asthma that makes sleeping miserable and is quite serious). Understanding the type of asthma you have can help you seek the most effective treatment when you have an asthma attack.
Allergies and Asthma
Allergies and asthma often go hand-in-hand. Allergic rhinitis (also called hay fever) is inflammation of the inside lining of the nose and is the single most common chronic allergic disease. In those with allergic rhinitis, increased sensitivity (allergy) to a substance causes your body’s immune cells to release histamines in response to contact with the allergens. Histamines, along with other chemicals, lead to allergy symptoms. The most common allergens enter the body through the airway.
With allergic rhinitis, you may feel a constant runny nose, ongoing sneezing, swollen nasal passages, excess mucus, weepy eyes, and a scratchy throat. A cough may result from the constant postnasal drip. Many times asthma symptoms are triggered by allergic rhinitis. Your doctor may prescribe medications to control the allergies and, in doing so, the cough and other asthma symptoms may subside.
For more detail, see WebMD’s Allergic Asthma.
Exercise-induced asthma is a type of asthma triggered by exercise or physical exertion. Many people with asthma experience some degree of symptoms with exercise. However, there are many people without asthma, including Olympic athletes, who develop symptoms only during exercise.
With exercise-induced asthma, airway narrowing peaks five to 20 minutes after exercise begins, making it difficult to catch your breath. The symptoms begin within few minutes of exercise and peak or worsen a few minutes after stopping exercise. You may have symptoms of an asthma attack with wheezing and coughing. Your doctor can tell you if you need to use an asthma inhaler (bronchodilator) before exercise to prevent these uncomfortable asthma symptoms.
For more detail, see WebMD’s article Exercise-Induced Asthma.
In the type of asthma called cough-variant asthma, severe coughing is the predominant symptom. There can be other causes of cough such as postnasal drip, chronic rhinitis, sinusitis, or gastroesophageal reflux disease (GERD or heartburn). Coughing because of sinusitis with asthma is common.
Cough-variant asthma is vastly underdiagnosed and undertreated. Asthma triggers for cough-variant asthma are usually respiratory infections and exercise.
For any persistent cough, contact your doctor. Your doctor may order specific asthma tests, such as lung function tests, to show how well your lungs work. You might need to see a lung specialist for further tests before an asthma diagnosis is made.
For more in-depth information, see WebMD's Cough-Variant Asthma.
Occupational asthma is a type of asthma that results from workplace triggers. With this type of asthma, you might have difficulty breathing and asthma symptoms just on the days you're on the job.
Some common jobs that are associated with occupational asthma include animal breeders, farmers, hairdressers, nurses, painters, and woodworkers.
For more detail, see WebMD’s article on Occupational Asthma.
Nighttime (Nocturnal) Asthma
Nighttime asthma, also called nocturnal asthma, is a common type of the disease. If you have asthma, the chances of having symptoms are much higher during sleep because asthma is powerfully influenced by the sleep-wake cycle (circadian rhythms). Your asthma symptoms of wheezing, cough, and trouble breathing are common and dangerous, particularly at nighttime.
Studies show that the most deaths related to asthma occur at night. It’s thought that this may be because of increased exposure to allergens (asthma triggers), cooling of the airways, reclining position, or even hormone secretions that follow a circadian pattern. Sometimes heartburn can trigger asthma symptoms at night. Sinusitis and asthma are often problems at night, particularly when postnasal drip triggers symptoms such as coughing.
If you have asthma and notice your symptoms worsening as evening progresses, it’s time to see your asthma doctor and figure out the causes of asthma. Understanding the right asthma medications and when to take them are key to managing nighttime asthma and getting quality sleep.
For more detail, see WebMD’s article Nighttime Asthma.
Health Conditions That May Mimic Asthma
A variety of illnesses can cause some of the same symptoms as asthma. For example, cardiac asthma is a form of heart failure in which the symptoms mimic some of the symptoms of regular asthma.
Vocal cord dysfunction is another asthma mimic. Many recent reports have drawn attention to a peculiar syndrome in which an abnormality of the vocal cords causes wheezing that is frequently misdiagnosed as asthma. This is most common in young females who have loud and dramatic episodes of wheezing that do not respond to medications that open the airways.
For more detail, see WebMD's Health Conditions That May Mimic Asthma.