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This is Dr. David
I am sorry about your father.
hemoptysis or coughing up blood is never normal.
your father should see a doctor and get some testing like a chest CT scan
he could have a lung infection or even a small lung cancer.
but if he is not willing to see a doctor then there is not much you can do
he has a right to live his life and live and die how he would like to
but it is unfortunate he is not willing to seek help from a doctor.
has he been loosing weight?