Read now These included questions about the use of emergency medication as well as the degree to which asthma symptoms interfered with daily activities.
Asthma causes recurring periods of wheezing a whistling sound when you breathechest tightness, shortness of breath, and coughing. The coughing often occurs at night or early in the morning. Asthma affects people of all ages, but it most often starts during childhood. In the United States, more than 25 million people are known to have asthma.
Overview To understand asthma, it helps to know how the airways work. The airways are tubes that carry air into and out of your lungs. People who have asthma have inflamed airways. The inflammation makes the airways swollen and very sensitive.
The airways tend to react strongly to certain inhaled substances. When the airways react, the muscles around them tighten. This narrows the airways, causing less air to flow into the lungs. The swelling also can worsen, making the airways even narrower. Cells in the airways might make more mucus than usual.
Mucus is a sticky, thick liquid that can further narrow the airways. This chain reaction can result in asthma symptoms.
Symptoms can happen each time the airways are inflamed. Asthma Figure A shows the location of the lungs and airways in the body. Figure B shows a cross-section of a normal airway. Figure C shows a cross-section of an airway during asthma symptoms. Sometimes asthma symptoms are mild and go away on their own or after minimal treatment with asthma medicine.
Other times, symptoms continue to get worse. Asthma attacks also are called flareups or exacerbations eg-zas-er-BA-shuns. Treating symptoms when you first notice them is important.
This will help prevent the symptoms from worsening and causing a severe asthma attack. Severe asthma attacks may require emergency care, and they can be fatal. Outlook Asthma has no cure. Even when you feel fine, you still have the disease and it can flare up at any time.
However, with today's knowledge and treatments, most people who have asthma are able to manage the disease.
They have few, if any, symptoms. They can live normal, active lives and sleep through the night without interruption from asthma. If you have asthma, you can take an active role in managing the disease. For successful, thorough, and ongoing treatment, build strong partnerships with your doctor and other health care providers.
Causes The exact cause of asthma isn't known.
Researchers think some genetic and environmental factors interact to cause asthma, most often early in life. An inherited tendency to develop allergies, called atopy AT-o-pe Parents who have asthma Certain respiratory infections during childhood Contact with some airborne allergens or exposure to some viral infections in infancy or in early childhood when the immune system is developing If asthma or atopy runs in your family, exposure to irritants for example, tobacco smoke may make your airways more reactive to substances in the air.
Some factors may be more likely to cause asthma in some people than in others. Researchers continue to explore what causes asthma. The "Hygiene Hypothesis" One theory researchers have for what causes asthma is the "hygiene hypothesis.
Many young children no longer have the same types of environmental exposures and infections as children did in the past. This affects the way that young children's immune systems develop during very early childhood, and it may increase their risk for atopy and asthma. This is especially true for children who have close family members with one or both of these conditions.
Risk Factors Asthma affects people of all ages, but it most often starts during childhood. In the United States, more than 22 million people are known to have asthma.
Asthma symptoms, also called asthma flare-ups or asthma attacks, are often caused by allergies and exposure to allergens such as pet dander, dust mites, pollen or mold. Non-allergic triggers include smoke, pollution or cold air or changes in weather. Asthma is a chronic disease that inflames the airways. This means that people with asthma generally have inflammation that is long lasting and needs managing. An asthma episode, also called an asthma flare-up or asthma attack, can happen at any time. Mild symptoms may only last a few minutes while more severe asthma symptoms can last hours or days. Figure A shows the location of the lungs and airways in the body. Figure B shows a cross-section of a normal airway. Figure C shows a cross-section of an airway during asthma symptoms. Sometimes asthma symptoms are mild and go away on their own or after minimal treatment with asthma medicine. Other times, symptoms continue to get worse.
Nearly 6 million of these people are children. Young children who often wheeze and have respiratory infections—as well as certain other risk factors—are at highest risk of developing asthma that continues beyond 6 years of age.12 days ago · A new study implicates remodeling of nerves in the airways as a key contributor to heightened sensitivity and airway constriction in patients with asthma.
The results provide new insight into a. In the RHINE study we also found that onset of respiratory symptoms and self-reported asthma was related to sleep related variables such as snoring and nocturnal gastroesophageal reflux (nGER). Figure A shows the location of the lungs and airways in the body.
Figure B shows a cross-section of a normal airway. Figure C shows a cross-section of an airway during asthma symptoms. Sometimes asthma symptoms are mild and go away on their own or after minimal treatment with asthma medicine.
Other times, symptoms continue to get worse. Many asthma patients have been directed by their doctors to take inhaled steroids on a daily basis. A new study suggests this may not actually be necessary in order to alleviate and control allergy symptoms. As a member, you'll also get unlimited access to over 75, lessons in math, English, science, history, and more.
Plus, get practice tests, quizzes, and personalized coaching to help you succeed. Some people with asthma may go for extended periods without having any symptoms, interrupted by periodic worsening of their symptoms called asthma attacks. .