Thanks for the query to H.C.M. Forum.
Swollen legs with mottled red color.
C O P D, steroid
Since , how many days ,you are having this treatment ( steroid).
The side effect of ( one ) steroid is retention of fluid on dependent parts ( legs).
Other cause may be due to diabetes
May be due to renal disorders ,
You mentioned that she is taking treatment for high blood pressure
, so when C O P D is there , may turn into congestive heart failure
Assessment for complete history is very important .
Elevation of legs in chair is not a treatment , rather it is time being relief.
function, heart function, liver function tests are required , if possible , upload the reports.
Hope I have answered your question.
If further any question I will help.