Foot odor includes physiological and pathological, physiological usually does not endanger health, but can cause psychological burden; pathological common in foot ringworm and other diseases, can lead to foot skin ulceration, infection spread to the whole body. Foot sweat glands, sweat itself does not smell, but the foot environment is warm and humid, suitable for the growth and reproduction of microorganisms, resulting in an unpleasant odor that is foot odor. Physiological factors and pathological factors can cause foot odor. 1. Physiological factors: Excessive exercise, mental stress, wearing non-breathable shoes and socks, etc., can lead to excessive sweating and local bacterial growth, resulting in smelly feet. This condition usually does not cause health hazards, but it will bring discomfort to people around, cause psychological burden, and affect daily life and normal socialization. It is recommended to clean the feet and change shoes and socks frequently to relieve the symptoms. 2. Pathological factors: the most common is tinea pedis, which is a kind of skin disease caused by fungal infection, especially when tinea pedis exudates and leads to epidermal breakage, and accompanied by bacterial infection, foot odor can appear. This situation needs to be given antifungal drugs or antibiotics and other treatments in a timely manner, otherwise it can lead to ulceration of the skin of the foot, spreading the infection to other parts of the body, causing sepsis, septicemia and so on. It is recommended that patients with smelly feet consult a doctor for a clear diagnosis and targeted treatment under the guidance of the doctor.