Causes Of Asthma

By Author: vikas gupta
Total Articles: 34
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Asthma can occur at any age but is more common in children than adults. Heredity can play a role. In young children, boys are nearly twice as likely as girls to develop asthma, but this sex difference tends to disappear in older age groups. Obesity is a newly identified risk factor for asthma.
There are many causes of asthma such as:
1. Dust mites, specifically mite feces, which are coated with enzymes that contain a powerful allergen. These are the primary allergens in the home.
2. Animal dander. Cats harbor significant allergens, which can even be carried on clothing; dogs usually cause fewer problems. People with asthma who already have pets and are not allergic to them probably have a low risk for developing such allergies later on.
3. Molds.
4. Cockroaches. Cockroach dust is a major asthma trigger and may reduce lung function even in people without a history of asthma.
5. Pollen, from plants.
6. An asthma attack can also be induced or aggravated by direct irritants to the lungs. Important irritants involved in asthma include cigarette smoke, indoor chemicals, and air pollution.
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... 7. Respiratory viral and bacterial infections play a role in some cases of adult-onset asthma. In both children and adults with existing allergic asthma an upper respiratory tract infection often worsens an attack.
8. Exposure to allergens (proteins which can cause an allergic reaction) during pregnancy - from foods in the mother's diet, for example
9. Being brought up in a house where there is a pet, especially a cat
10. Having certain illnesses as a child
11. Being exposed to cigarette smoke in the womb or early life - babies whose mothers smoke are twice as likely to develop asthma
12. Having allergies to things such as pollen, house-dust mites and mould
13. Contributing factors in the Western world include air pollution and processed foods
14. Indoor allergens (for example house dust mites in bedding, carpets and stuffed furniture, pollution and pet dander)
16. Outdoor allergens (such as pollens and moulds)
17. Tobacco smoke
18. Chemical irritants in the workplace
19. Air pollution

Asthma is a chronic condition, which means attacks can occur throughout your life. However, whilst there are times when severe episodes strike, for most asthmatics there are long periods during which they have few, if any, symptoms. While asthma is caused by an inflammation of the airways, scientists don't know exactly what causes this inflammation. Asthmatic and allergic tendencies run in families and scientists believe there are a number of different genes that react with environmental factors to trigger the onset of asthma. Whilst scientists are searching for the genes involved, they do already know that there are a number of things that could increase the risk of developing the condition. The early months and years of a child's life are critical times during which a baby can develop or become susceptible to developing asthma. The abnormal development and growth of the lungs can increase a person's risk for developing asthma. Premature babies born with lungs not fully developed are more susceptible to colds and other respiratory infections. In some cases, an infection can cause inflammation and injure lung tissue. If the baby is exposed to secondhand smoke at this time, more damage to the lungs may occur and change how the lungs function.

Are many non-allergic or non-immunologic exposures in the environment that can increase the chance of developing asthma? Exposure to irritants on a long-term basis, such as secondhand smoke in the home, is a major risk factor for developing asthma. Other exposures like this are indoor chemicals and air pollution. Some studies suggest that certain infections or allergy exposure during the first years of life may also affect the development of asthma.

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