Hi there,
There can be several reasons for a swollen foot or swollen feet. If it is only one side, then it gets rid of some of the possibilities such as the heart not pumping quite as well as it could, or low proteins in the blood.
On one foot only, it can be due to trauma (did you bang it?)your lymphatics (see
www.lymphoedema.co.uk) veins or DVT (see
www.veins.co.uk) or could be arthrits or gout if only part of the foot is swollen.
It would be sensible for hyour to see your GP - esp if it isn't going down or if you have any other symptoms.
Mark