Hi,
Since you have not told me about the age of the patient ,with only history available that she was a smoker,following might be the causes -
- Bronchitis
- Brochiectasis
- Lung carcinoma
- Pneumonia
For all of these you will have to leave smoking.You may quit smoking suddenly but doctors at might not recommend it because this might suddenly lead to dropping of hormone levels in blood which might cause depression.
For knowing about the exact cause about the disease, I will have to know ...
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