Even the smallest amount of sodium swells feet hands/face etc. Alot of potassium and water has been only found short relief. Any diseases like this?

Maybe. As long as you get regular checkups and don't have any other issues, there's probably no issue. Sodium can cause swelling in a lot of people with diseases and also in healthy people if they eat enough. You might be surprised how much sodium is in everything we eat. If you haven't get a regular checkup soon.