Sweaty feet have always had a sour odor may be sweating, poor hygiene habits and other physiological factors, or to consider is due to tinea pedis, hyperhidrosis and other diseases, can be eliminated for the cause of the general measures, medication, surgical treatment and other ways to eliminate. 1. Physiological factors: if sweating, strenuous exercise, do not clean feet, may lead to sweat accumulation, sweaty feet have been the case of sour odor. This kind of situation is a normal phenomenon, keep the local clean and clean, wear air permeable shoes, can relieve the situation of foot odor. 2. Tinea pedis: sweaty feet have always had a sour smell may also be due to tinea pedis, patients can be under the guidance of a doctor to use topical antifungal drugs, such as miconazole, econazole, ketoconazole, etc., or topical salicylic acid application and other exfoliating agents, after standardized medication, can alleviate the situation of smelly feet. 3. Hyperhidrosis: sweaty feet have been sour smell is also considered to be caused by hyperhidrosis, patients can follow the doctor’s instructions for the external use of aluminum chloride solution, aluminum acetate solution, or oral atropine, belladonna and other anticholinergic drugs. Some patients can also take botulinum toxin local injection, etc., to eliminate the symptoms of sweaty odor. There are many reasons that cause sweaty feet to smell sour all the time, and it is recommended that patients identify the cause of the disease in a timely manner so as to take relevant treatment measures.