It is true that many patients have a recurrence of foot fungus in winter. In winter, patients need to wear thick shoes and socks for a long time, so the feet are in a relatively humid and hot environment for a long time, which is ideal for the growth of fungi, so it is easy to have a recurrence of foot odor. This environment is ideal for the growth of fungus, so it is easy for the recurrence of foot fungus. Moreover, such patients are often not treated adequately during the previous treatment. Generally speaking, after the symptoms of foot fungus have disappeared, it is necessary to insist on a period of treatment in order to completely remove the local fungus, and such patients often stop treatment without insisting on the course of treatment. And there are also patients who have recurrent foot odor in winter, which is actually due to the shoes. Although patients can wash their feet and change their socks every day, their shoes are not disinfected in time and are not exposed to the sun properly, so there may be fungus in the shoes all the time.