Cold feet and poor circulation are used as if they were one thing. This page, written for readers around Des Plaines, lines up the terms that travel with them and keeps each to what its source says.

Where poor circulation shows up
Cleveland Clinic says: "Often, poor circulation symptoms affect your legs, hands, fingers, feet and toes." The feet are one place on a list. A cold foot is a symptom location, and the term "poor circulation" is the broader label sitting over it.
What the label is tied to
Cleveland Clinic also names what sits behind the term: "Plaque buildup, blood clots or narrowed blood vessels can lead to poor circulation." That sentence separates the symptom from the cause list. A description that offers a fix for cold feet without saying which of those is involved has skipped a step.
Terms that sound alike
Several nearby names turn up in foot-care reading. The American Diabetes Association page titled Foot Complications and NIDDK's Diabetes & Foot Problems both sit under diabetes in their titles. They are not circulation pages by name, and a reader should keep that in view.
Ulcers and diabetic foot as separate labels
MedlinePlus has an entry titled Ischemic ulcers - self-care, and a separate paper is titled Diabetic foot. One title names ulcers and the other names the diabetic foot. The two labels are neighbors of "poor circulation," and each has its own page.
Who each source is documented for
Cleveland Clinic's lines describe poor circulation in general. The titles from the American Diabetes Association and NIDDK place their subject in diabetes, as does the Diabetic foot paper. The MedlinePlus entry is framed as self-care for ulcers.
The question that decides it
Ask which label applies before asking which treatment: is the concern a cold foot, a circulation cause such as plaque, clots or narrowed vessels, or a diabetes-linked foot problem? The answer decides which source above is the one to read.