Foot fungus is a condition that can take many forms including athlete's foot and toenail fungus, all of which are caused by microscopic fungi organisms that make their way into or onto the foot, according to WebMD. Most people get the microscopic fungi organisms when they wear tight shoes and socks with sweaty feet or walk in damp areas, such as locker rooms, showers and swimming pools, as noted by the American Podiatric Medical Association.
Toenail fungus is a type of foot fungus that grows under the nail bed. Patients with toenail fungus will see that their nails start to smell and turn into dark purple or black colors. They might also find that their nails are thicker and are painful to the touch including when they wear shoes, as reported by the American Podiatric Medical Association. This foot fungus can be treated from home as long as it is mild, but severe cases should be treated at the podiatrist's office where oral antifungal treatments and topical medications can be prescribed.
Athlete's foot is another common type of foot fungus and involves the entire foot. This fungus is often accompanied by itching, burning and stinging sensations as well as a rash. This fungus is also contagious and many athlete locker rooms spread the fungus quickly due to damp conditions and sweaty feet, as stated by Mayo Clinic.