This is soooo cool. I found this on Namaste Health Center's website. It is weird but makes so much sense. Traditional medicine has gems like this that should be resurrected:

Magic Wet Sock Treatment
We love to recommend this old-time nature cure remedy that anyone can do at home. It involves using the principles of hydrotherapy to boost the immune system for both acute illnesses and prevention. All you need is two pairs of socks and a bowl of ice water! Grab a pair of thin cotton or polyester blend socks and put them in a bowl of ice water by your bed. If you are feeling chilly or feet are cold, take a warm bath or at least warm your feet first. Take the socks out of the ice water and wring out until barely damp, then place on your feet and put dry wool socks over the top and get in bed. While you are sleeping, your body is increasing circulation and lymphatics to dry the damp socks, which can also make a low grade fever much more productive to kick out even stubborn viruses! You will likely wake up sometime during the night and your feet will be hot and socks are dry, at that point you can take off the socks…the whole process of warming the socks is what will boost the immune system. Sounds weird, but it works!