Let's talk about the feet first.
What type of lung disease do you have - bronchitis or emphysema?
What kind of medicines do you use for the COPD? - please include pills and inhaled
Are you using any oxygen?
Any heart history or medicines like Lasix or Blood pressure pills?
When did the feet start to swell?
Has it ever happened before?
How swollen are they? Are they of normal temperature?
What have you done so far - is the doc aware of the swelling?
The finger is another issue, I feel is unrelated to the COPD.
When did you first notice it?
What finger is it?
Is it continuous? If no, when is it better or worse?
Last question - your age?