Foot odor is a physiological phenomenon, not necessarily a manifestation of the body suffering from disease, but also may be a symptom of stinky sweating, tinea pedis. Foot odor belongs to stinky sweating, is due to the sebum, dander and other filth secreted by the soles of the feet by the soles of the feet and shoes of microorganisms decompose to produce ammonia and other unpleasant gases. After wearing shoes, the environment of the soles of the feet is humid and airless, and microorganisms multiply, so the odor will be more obvious. Some patients with tinea pedis will have a certain odor due to the large amount of fungal growth on the toes and soles of the feet. Patients with metabolic diseases such as diabetes and hyperthyroidism, due to increased secretion of sweat on the soles of the feet, the odor will be more pronounced than before the disease. Patients with hyperhidrosis usually try to wear loose and soft shoes, keep local cleanliness, and wash their feet every day. It is best to eat less spicy and irritating food. Congenital foot odor is mostly physiological, generally do not need treatment, acquired foot odor many and disease-related, the need for timely consultation.