Cold sweats are psychogenic and the main areas of sweating are mainly on the soles of the feet, palms and forehead. When the body is mentally stressed, anxious, fearful, etc., the sympathetic nerves become excited and the sweat glands that innervate the soles of the feet begin to secrete sweat glands.
There is also the possibility of poorly ventilated shoes and socks. You should wear socks with good sweat absorption and choose footwear with good ventilation for cold sweats on the soles of your feet.