I deal with very similar issues. If it's new symptoms, and been a couple of days, it may be a relapse.
If it's a long standing issue, it's just something we have to deal with. None of us know what symptoms are going to bother us on a daily basis. All you can really do is try to rest.
Everyone has different symptoms. If the foot is cool to the touch and does not go away you might want to have the circulation checked.
Alex