Our expert says:
Dear Concerned wife,
Does he work in an area that produces a lot of smoke or gasses from cars, or is he smoking? It sounds like he is coughing up soot. It could however also be dry blood which will make it more serious - please take him to your GP for possible x/rays. Ask him to cough onto a white hankerchief and take it with to the dr to show him. (We don't mind looking at gooy stuff if it will help us make a proper diagnosis!)
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