I have pain and a little swelling in the arch of my foot. Is there anything that might help?
You could have something called tarsal tunnel syndrome but you'll have to see a doctor to know for sure. Tarsal tunnel syndrome is caused when a nerve running the ankle to the heel gets compressed and it causes arch pain. It can be caused by all sorts of things; an injury or scar tissue, diabetes, arthritis, etc. Insoles, corticosteroid injections and other means are used to treat it.
You might want to try out the Check a Symptom box on the upper left hand of the Health Central pages and see what you find.