This sounds like Hyperhydrosis. It is estimated that 5% of the worlds population has this very problem. Its exact cause is unknown, although many think it to be inherited. What we know for sure is that excessive sweating of feet contained in a dark and enclosed spot (your shoes) for long periods of time can lead to skin breakdown, infections, and create a perfect storm environment for bacterial and fungal growth. The byproducts of these microbial organisms can smell bad.
So what can you do about it?
Wash your feet at least twice/day, then apply talcum powder or corn starch. If you have athlete's foot, then also use an over-the-counter anti-fungal medication. Wear absorbant socks. Wicker (acrylic) socks or cotton (changed frequently) would be helpful, too.
More Aggressive methods:
If that does not work, then visit your podiatrist or dermatologist. Other treatment modalities involve oral anticholinergic and/or anti-anxiety medications (needs physician monitoring), electrical currents (iontophoresis), clinical strength antiperspirants, and botox.
Going Overboard: Other more aggressive methodologies such as sympathectomy (cut the sympathetic nerve that innervates sweat glands) or a particular laser treatment that destroys (ablates) the odor causing glands. Both of these methods have high degrees of risk, however, for other side effects that might be worse than the hyperhydrosis itself. I would therefore not recommend them.
The Organic Proponents: As always, there are alternative methods of medicine that may claim to treat this condition, but probably have very limited applications.
Bottom Line: In almost all cases, the practical solutions will be quite sufficient, but if they are not, seek out a physician well-versed in these areas.
To your good foot health,
Dr. Joel C. Rutherford, DPM
A glass piece has gone inside my foot and the area has become red. Will a podiatrist be able to help me?
Removing tiny glass fragments from the plantar (bottom) soft tissue of your foot needs to be performed delicately and ASAP. This procedure can be relatively easy or difficult depending on how deep the glass shard is located and how quickly you report to your podiatrist. Typically, X-rays are not able to differentiate glass from soft tissue because the densities of both are so similar. One key element to locating the glass is to know how to do the least cutting when removing this foreign body. It is prudent to remove the glass immediately, before it migrates deeper into the foot.
Also note that you need to avoid the risk of infection as soon as possible. Soft tissue infections are usually treated easily with antibiotics, whereas bone infections (may occur if treatment is delayed for too long) are often only resolvable by removing the infected bone (partial amputation).
If you have glass in your foot, then you need to get this looked at as soon as possible. Podiatrists are foot experts. Orthopedic Surgeons trained in foot surgery are also excellent choices. Other allied clinicians may be of assistance as well.
Dr. Joel C. Rutherford, DPM