What causes
asthma is a one of the main questions that is interesting for people who has
this illness. Asthma is a chronic inflammatory disease of the airways main
symptoms of which are repetitive attacks of breathlessness. This breathlessness
attacks are caused by bronchial obstruction which develops from different
reasons. This condition can not be treated, but with good management and
treatment person can live normal active life. There are many types of asthma:
- Child-onset asthma begins during childhood because a child becomes to be sensitized to common allergens; often child has other atopic diseases as dermatitis.
- Adult-onset asthma also can be caused some allergens, but begins after 20 years.
- Exercise-induced asthma attacks develop after physical training.
- Occupational asthma develops from chemicals that irritate person during work time. It can be pollutants, viruses, gases, smoke or dust that present in production where person works.
- Nocturnal asthma attacks occur during night time, more often it happens between 2 and 4 am
- Steroid-resistant asthma it is a severe type of asthma which can not be controlled by steroids.
What is a mechanism
of asthma attack development?
The classic
signs of asthma attack are breathlessness, chest tightness and wheezing.
Hypoxia can develop so then skin and nails have blue color. At the end of
asthma attack person expectorate clear sputum.
After
contact with trigger factor inflamed bronchi become narrowed because muscles that
around them contracts. Airways contraction and mucus in bronchi causes dyspnea
and breathlessness.
What causes asthma?
Asthma
caused both genetically and environmental factors. It is impossible to say than
some one certain factor caused asthma in this or that person. All these causes of asthma work in complex.
There are
many environmental triggers that can cause the disease; they are pollutants,
viral or bacterial respiratory infections, psychological stress, chemicals, and
tobacco. If asthma is allergic, these triggers are dust mites, pollen, pets and
mold. Tobacco smoking including “passive smoking” can be the reason of asthma.
You have not allow your child to be near people who smoke. Exercises,
especially at the cold air can cause asthma attack. Some drugs like aspirin,
naproxen, ibuprofen and other NSAIDs can cause asthma in people who are
sensitive to this medication. Individual can also react on perfumes, strong
smells. Climate changes are strong asthma triggers. Windy, cold weather can
cause asthma attack.
People
react on triggers in different way. Some of them have many triggers, some –
only one. It is possible that asthma attack will not develop after contact with
trigger. But sometimes it can occur just after expressing strong emotions.
Often all
these trigger factors acts only with genetics. Approximately 25 genes are
associated with asthma. Some genes can work with certain trigger factors from
environment. Children with atopy are very susceptible to have bronchial asthma.
Atopy is a genetically
determined state when individual is hypersensitive to common allergens which
not cause allergy in healthy people. In infants atopy looks like atopic
dermatitis or it can be a food allergy.