How can compression therapy risks be minimized?

You have been given compression garments, or expect to be, and you want to keep them from causing trouble.
What the source says to do
my.clevelandclinic.org gives two habits: in many cases, you can avoid problems by making sure your compression therapy garments fit properly and you are using them as prescribed.
Turning that into questions
Fit and use are the two things in your hands, so ask about both at the start. Have the clinician confirm the garment fits you, and ask exactly how it should be used. Keep those instructions where you can find them.
Reading to do first
The compression therapy guide and the chronic venous insufficiency guide round out the picture.
The question to ask
Ask what the clinician wants you to do if it does not fit as expected.