Today is Groundhog Day in both Canada and the USA. The groundhog Wiarton Willie came out of his burrow and saw his shadow. Unfortunately, for us it means 6 more weeks of winter weather.   Winter weather can be difficult on our skin. The humidity inside our homes can be very dry especially if a humidifier is not installed on a furnace. You can see the effects low humidity on wood furniture.   Skin needs to be hydrated or moisturized to maintain its ability to withstand stretching or tension. Cracked dry skin especially on our feet can mean trouble.   Some people suffer every winter with dry cracked heels or cracks on the bottom of their feet. As the skin gets drier it cannot withstand any type tension or pulling apart of the skin. This happens very easily on our heels. With every foot step we take, the skin at the edges of our heel will stretch.   If our skin is adequately hydrated this skin stretching is not a problem.   Dry skin is easier to stret...