Two very different conditions produce leg symptoms that people describe in almost identical words. Pain. Cramping. Heaviness. Burning. Difficulty walking as far as you used to. One involves your nerves. The other involves your arteries. They need different investigation, different treatment, and in one case the implications extend well beyond your legs. Telling them apart is not something to do from an article. But knowing which questions matter means you can describe your symptoms in a way that gets you to the right answer faster.