The common causes of foot odor include physiological factors, pathological factors such as hyperhidrosis, tinea pedis and other diseases. 1. Physiological factors: If you usually wear some breathable shoes, in the foot sweat, but also did not wash the feet in time, over time, the foot bacteria breeding, easy to produce odor, usually after cleaning the feet, odor will be reduced or even disappear. 2. Hyperhidrosis: this disease is a local or systemic skin sweating abnormally increased a disease, often associated with infections febrile diseases, metabolic, endocrine diseases, medication factors, psychiatric factors, etc., can appear foot sweating too much, bacterial growth, and sweat in the local skin bacteria decomposition, the formation of ammonia-like substances, the symptom of smelly feet. 3. Tinea pedis: this disease is mainly caused by fungal infection, fungi will destroy the skin stratum corneum, resulting in blisters, vesicles, and even odor symptoms. If you exclude physiological factors, it is recommended that the patient go to the regular hospital dermatology consultation, follow the doctor’s instructions to clarify the diagnosis, active treatment, to avoid delaying the condition.