ஆஸ்துமா- காரணங்கள், மூச்சு விடுவதில் ஏன் சிரமம் ஏற்படுகிறது?

Asthma - Reasons and Symptoms 

Asthma is an inflammatory disease of the airways to the lungs. 

It makes breathing difficult and can make some physical activities 

challenging or even impossible.



To understand asthma, it’s necessary to understand a 

little about what happens when you breathe.

Normally, with every breath you take, air goes through 

your nose or mouth and down into your throat and into your airways, 

eventually making it to your lungs.

There are lots of small air passages in your lungs that help 

deliver oxygen from the air into your bloodstream.

Asthma symptoms occur when the lining of your airways 

swell and the muscles around them tighten. Mucus then fills 

the airways, further reducing the amount of air that can pass through.

These conditions can then bring on an asthma “attack,” 

the coughing and tightness in your chest that’s typical of asthma.

Symptoms

The most common symptom of asthma is wheezing, 

a squealing or whistling sound made when you breathe.



Other asthma symptoms may include:



coughing, especially at night, when laughing, or during exercise

tightness in the chest

shortness of breath



Causes

No single cause has been identified for asthma. 

Instead, researchers believe that the breathing condition 

is caused by a variety of factors. 

These factors include:

Genetics. 

If a parent or sibling has asthma, 

you’re more likely to develop it.



Allergens trigger this common type of asthma. These might include:

pet dander from animals like cats and dogs

food

mold

pollen

dust

burning wood

cigarette smoke

cold air

air pollution