The survival time of foot fungus leaving the living body is related to its environment, which should be analyzed on a case-by-case basis and cannot be generalized. Usually a cold and humid environment is more suitable for foot fungus to survive, and if the environment is not changed, it can survive for a long time. But if it is exposed to dry and ventilated, sunny environment, the survival time of foot fungus is not more than 30 minutes, but this is only for the mycelium with the fungus, the spores of the fungus often have a strong resistance, can survive in an unfavorable environment for a long time. Since foot odor is caused by fungi, which are generally heat-insensitive and sensitive to chemical disinfectants. So the foot fungus after leaving the living body can be quickly sterilized by sunlight exposure, or by spraying chemical disinfectants such as formaldehyde, phenol, tincture of iodine and peroxyacetic acid to kill the fungus quickly. In addition, in the premise that the foot skin is intact once in a while contact footwear of foot fungus patients, rarely will there be infection, do not worry too much, do a good job of daily cleaning can be.