I had a chest x-ray a week ago, and I am allergic to whole milk, which I was drinking I started coughing and spitting up phlem for one week before the x-ray. Does a chest x-ray show phlem if you have a respiratory track infection and can it show if you asthma?
The x-ray may show thickening of the bronchial wall with acute bronchitis, but not the phlegm. With asthma the x-ray doesn't show phlegm either, usually it appears normal, but it can show hyperinflation.
With pneumonia, the alveoli, commonly called air sacs, are filled with phlegm and you can see it.
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