Feet have such a stigma for being disgusting, improper and dirty. Most people just want to cover them up and pretend they don't exist. In Thailand, it is considered rude to point you feet at people, and it is rude in many countries to show the bottoms of your feet to other people. During the last supper, Jesus washed the feet of his disciples. Foot washing is a religious rite observed in many christian sects. It represents humbling yourself before the person whose foot you wash. Also, it is customary for muslims to wash their feet before prayer as a way of cleansing, which is mentioned in the Koran.
Detoxification through feet:
Your feet are a major detoxification organ. Smelly feet are a sign that your body is ridding itself of toxins. Try a detox regimen if you have stinky feet. You may find that once you've helped your body rid itself of the toxins, the stink will clear. In addition, a general may to steward good foot (and general) health is to be barefoot as much as possible. Many people wear shoes and socks constantly, but this stifles the natural "breathing" of the feet, and can inhibit detoxification mechanisms.
I have heard stories of radiation therapy patients having their feet turn black, as all the junk is expelled through them. Imagine the bottom of a jar of salad dressing: All the bits go to the bottom. Your feet at the lowest point on your body. This is one reason why elevating your feet can be healing for many different foot conditions, including edema and sprains.
Onions and Feet
One folk remedy that I've read quite a lot about plays on this tendency of pushing yucky stuff our through your feet. You take thick slices of fresh onion (1/2" thick), put them in the bottom of cotton or wool socks and leave them overnight, or on all day in the case of a bedridden patient. Change the onions after they darken or dry out. This has been known to prevent infection of whatever is "going around," and also quicken the recovery of someone afflicted with a flu or fever. The reason onions are used is twofold: they are highly antibiotic, and they absorb bacteria and toxins like a sponge. For this reason, you should not leave cut onion exposed in your fridge, as it could absorb some sketchy bacteria.
Imagine the onion farmers during the great plague of Europe, sleeping with onions strapped to their feet. Legend has it that those people were among the few not infected. Next time you've got a serious gripe, give it a try. The worst thing that could happen is your feet smell like onions, which for some people would be an improvement.
Therapies for the feet
Many cultures and groups traditionally have foot-centered therapies. In Chinese reflexology, The bottom of the foot acts as a representation of the whole body. In other words, the big toe is the head and the heel is your feet. Various portions of the middle of the foot represent organs. A reflexologist may be able to tell what parts ail you by where you experience pain upon pressing. They will then work points with acupuncture or acupressure, until an improvement is made. This works much like whole-body acupuncture. To work with this idea at home, give yourself foot massages, pressing on points that "seem right" (for lack of a better word). Observe any results or feelings.
Hydrotherapy (aka soaking your feet in some hot or cold water) is an ancient method to relax, detoxify and tonify. It's as simple as dipping them in a creek for a few minutes on a hike (notice how amazing they feel), or preparing a tub of hot or cold water and soaking them while relaxing on the couch. On some mornings, I fill the bathtub with cold water and stand in there for a minute or so. I sometimes even sit on the side and read for a bit. This helps me start my day off on the right foot. Hot foot baths are also beneficial, and better if you're under the weather. As a general but not all-encompassing rule, avoid cold baths for the sick, though tepid water may serve a feverish person.
Should I walk barefoot?
The idea that walking barefoot (or with minimal shoes) is beneficial to your feet and to your whole anatomy is becoming more accepted as fact. Even Nike are attempting to make shoes that are like being barefoot.
There are two basic problems with highly cushioned shoes: they don't allow for the natural bending and compensation of side-to-side motion, and they create a detrimental heel-toe strike. In other words, cushioned shoes allow muscles to go soft, and force an inordinate amount of weight to be improperly stacks on the wrong joints. Many people now believe that running shoes are the reason for the enormous rise in running injuries that has occurred since the introduction of the cushioned shoes by Nike.
So my verdict is: barefoot walking/ running is great given that you striking with the ball of the foot (which should naturally occur with bare feet), and you don't step on anything sharp. Most people will need to "season" their feet, and eventually develop callouses to make it more comfortable. Walking barefoot on soft grass while engaging the gripping motion of the toes is a good place to start if you are timid about it. I highly recommend anyone with bunions to try a little barefoot walking out. There is a large movement of people with a lot of experience. The Barefoot Runners Society is one of several groups world wide.