It's helped with other things, esp back and neck tension, but also I noticed less foot cramping
. Calf stretches as Jen suggests and also stretching out the foot
itself, as far as you can, holding it as long as you can, without overdoing it. A physio could probably show you the best way to do these. Drugs might help, but if you can avoid them and get relief naturally, this is IMO the better route to go.