Foot cramping/swelling?

If it's swollen, use the RICE method - Rest, Ice, Compression and Elevation. Ice will help shrink the swelling and it will absolutely help the pain. It's either badly bruised or something is broken - you may have to see a Dr. and get an Xray to be sure. For now, take an anti-imflammatory, like Advil, keep it elevated and see if it's better in the morning. If not, please see a doctor.

Drink water for flushing the swelling

Have a couple swigs of molasses of a couple of bananas for the cramps

Learn more about muscles

Read The Trigger Point Therapy Workbook by Davies.

Trigger points are knots in the muscles making them tight which in turn causes them to apply pressure to nerves and other places.

all physical activities cause lose of fluids. particularly the leg and its various parts get tired. it is better to recharge your water level with frequent sips of water, juice and other liquids as your are familar with and available in your region to avoid severe loss of fluids. Cramps are due to loss of body fluids and prevention is best. However in your cause it is also injured and hence causing more pain. You could have gone for some gentle massage, warm water bottles , and may be some physical activities not causing more aggravation

It sounds like you have a bruised foot and it's gust know given you spasms.Try and get a heating pad and put it up for the night.

it is probably just bruised some heat and a massage might help it