Forgive the cliche but, “I’ve got that.” In my case it is what is called “Venous Insufficiency” whereby veins in foot/leg restrict blood flow. No cure, I’m afraid. Medication is blood thinners (well dodgy) and you also get a set of “compression stockings”. These are quite effective at relieving discomfort but are a right sod to get on and off. I even bought this frame pulling thingey which handles of of them but now the other,
Must agree with everyone else – go see your GP. Important to get an accurate diagnosis.