What is the reason for the sour feet?

Foot odor is mainly a manifestation of sweatiness. The sweat secretion of eccrine glands is relatively strong, sweat evaporation is limited, especially the feet due to regular exercise, foot sweat is more, evaporation is slower, bacteria decompose sweat and its skin secretions, it will cause odor performance. Treatment should first pay attention to frequent change shoes and socks, often dry shoes and socks, at the same time can use some sweat absorbent insoles, or when wearing shoes sprinkle some talcum powder. These all help keep your feet dry. For sweaty feet, soak in alum to help reduce sweat.