This is Dr. David
if he is having that bad time breathing, you should bring him to the hospital.
he needs to see a pulmonologist and get a pulmonary function test and a chest CT scan.
it is hard to demand things in the UK.
usually your GP has to clear you for any sort of testing.
best thing is to go to the A&E department if he can't breath
and see if they can do the test there.
symptoms are not a good way to look for cancer.
best way to check for cancer is a chest CT scan
I am a cancer doctor
does he smoke?
that is good he doesn't smoke.
he could have a mucous plug
or a mass in his lung blocking his airway.
he needs to get a chest xray or chest CT scan quickly.
they can do a chest xray for him at the A&E department.
in the US they can
I'm not sure about in the UK.
that is a plug of mucous which is thick and can block air flow into the lungs
and cause cough and irritation
but a mucous plug would not look like a shadow on a chest xray.
I would work on getting a copy of his chest xray report as well.
and get him a chest CT scan as soon as possible.
he might need oxygen.
he should get his pulse oxygenation reading checked.
this can check if oxygen is getting into his lungs.
it is a simple finger light test which can check the percentage of oxygen in his blood .
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