Athlete's foot is caused by a parasitic fungus and is a communicable disease.
It is typically transmitted  in moist environments where people walk barefoot, such as showers, bath houses, and locker rooms.
It can also be transmitted by sharing footwear with an infected person, or less commonly, by sharing towels with an infected person.
Athlete's foot pathophysiology
Diabetic foot pathophysiology
Athlete's foot laboratory findings
Morton's neuroma pathophysiology
Diabetic foot other imaging findings
Gangrene risk factors
Fournier gangrene pathophysiology
Fournier gangrene risk factors