Severe foot odor in late pregnancy is not fetus poisoning, it is caused by fungal infection and this disease has a certain chance of transmission. Foot fungus is caused by fungal infections, which are related to the infection of dermatophytes such as Trichophyton rubrum and Trichophyton spp. Usually during pregnancy, pregnant women are in a state of low immunity, which is suitable for fungal growth and can easily lead to severe foot odor. According to Chinese medicine, fetus toxin is the heat toxin produced in the mother’s body during pregnancy, which can easily cause the newborn baby to suffer from sores and boils after the birth of the mother. Therefore, severe foot odor in late pregnancy is not caused by fetus toxicity. It is recommended that pregnant women soak their feet in white vinegar and apply topical medication under the guidance of a dermatologist to relieve the symptoms of foot odor. Since women are in a state of low immunity during pregnancy, it is recommended to keep the feet locally dry, clean and hygienic, and usually pay attention not to wear plastic shoes, so as not to aggravate the symptoms of foot odor because they are not breathable.