Any advice on what over-the-counter treatments could help leg swelling, foot numbness due to circulation problems?

Complex question: If the cause is poor venous circulation- elevation of legs frequently, compression hose, salt restriction and and leg toning exercise are all easy to do.

See a Physician: I do not think that over the counter products will help your circulation. You should see a specialist and have your circulation checked out.

Support stockings: You may want to look up berger's exercise.