I resently migrated to canada from jamaica and my feet are swollen none of my shoes fit, what causes this?

Salt of the Earth.: When you made the move from Jamaica to Canada, your environ changed. You went from an area of high heat and humidity to one of lower humidity and cooler temperatures. This may have altered your physiology, including the rate of perspiration and salt loss. Since your move you are losing less salt, therefore you need less salt now. Possibly, this relative salt increase is causing your swollen feet.