What are some quirky signs that your COPD treatments are working?

I have noticed some signs in the last month that give me encouragement that my treatments are working. In this case I think that it is the oxygen therapy in particular because I have been doing the others for a few years.

Hair growth is one of the things that come to mind for me. I don't mean that luxurious hair atop your head, but that which grows on other parts of our bodies.

I have noticed that I need to shave my legs and under my arms now more than I have had to for at least 2 years.

I know, leave it to me to bring up something so non conversational, but there is a reason for this. The lessening of hair growth on our legs and under our arms is basically due to poor circulation.

I am making the assumption that decreased oxygen saturation would cause about the same response. The body is protecting the core and shutting down less necessary functions. Oxygen flow is lessened to the extremities first thus lessening the growth of hair.

I would love to hear your responses.