Of all your body parts, the feet and hands are the first part of your body to become cold. When your feet are cold the rest of your body follows suit and becomes cold too.
Your feet have more than 250,000 sweat glands on each foot and are among the most
perspiring parts of the body. They can lose over a cup of sweat per foot per day.
Wear socks made from merino wool as this a natural fibre will let your feet breathe which is better for the health of your feet. Damp socks caused from feet sweating will cool your feet down as the sweat gets cooler.
Change your socks more frequently as this could be caused from sweat cooling down.
Soak your feet in warm water then dry them and put your warm socks on.
Thicker merino socks are a better insulator than thinner ones.
Buy the correct sized socks as lose socks will create air pockets around the foot, letting in the cold air.
Rubbing or massaging your feet is great for your foot circulation. You could rub a foot lotion in too. Some lotions are especially made for that reason and have special ingredients to help with circulation. Then put your merino socks on to hold in the heat.
Wear slipper socks under your slippers and then slip into bed with them still on your feet. These have 30% wool in them so they are even better than other socks for keeping your feet warm.
Use a warm wheat bag, hot water bottle (hotty), electric blanket or wool blanket which is tucked in well around your feet.
Keep your house or the room warm.
Socks made from merino wool are warm and absorbent, due to the fact that wool can absorb up to 1/3 of it's weight in liquid and still feel dry. They are the best socks to keep your feet warm.