Sweaty feet with a sour odor in summer, may be physiological reasons, such as high ambient temperature, too much exercise, shoes and socks are not breathable, etc., replacement of breathable shoes and socks can be relieved. It may also be a pathological cause, such as foot odor sweating, tinea pedis, etc., treatment methods include medication, etc., should be timely to the hospital. 1. Physiological reasons: when the environmental temperature is too high and wear shoes and socks are not breathable, it may lead to an increase in foot sweating, and because the sweat can not be distributed in time, the accumulation of fermentation and sour odor, can be relieved after wearing breathable shoes and socks or reduce sweating. 2. Pathologic causes: Foot hyperhidrosis: hyperhidrosis refers to sweat gland secretion with special odor, foot skin sweat more, epidermal bacteria decomposition of sweat and skin surface dirt, there may be foot sour odor. You can follow the doctor’s instructions to use drugs to manage, drugs including 2% ~ 4% formaldehyde solution, 20% aluminum chloride anhydrous ethanol solution. Tinea pedis: Tinea pedis, commonly known as “foot fungus”, is a common skin disease caused by fungal infection of the foot skin. Tinea pedis may be manifested as feet with sour odor, superficial skin fungal infection is the cause of tinea pedis. Patients can follow the doctor’s instructions to use medication, drugs include amorolfine, ketoconazole and so on. Sweaty feet with sour odor in summer, you should go to the hospital in time, follow the doctor’s instructions for treatment, do not self-medication, so as not to delay the condition.