Feet and ankle swelling (or edema) can be due to reduced blood flow which can be a result of a heart condition. Other causes can be medication, too much salt, not enough exercise, etc. For more information, see http://www.nlm.nih.gov/medlineplus/edema.html
A visit to the doctor is in order if you suspect circulatory system issues.
We hope you find this general health information helpful. Please note however, that this Q&A is meant to support not replace the professional medical advice you receive from your doctor. No information in the Answers above is intended to diagnose or treat any condition. The views expressed in the Answers above belong to the individuals who posted them and do not necessarily reflect the views of Remedy Health Media. Remedy Health Media does not review or edit content posted by our community members, but reserves the right to remove any material it deems inappropriate.