For ordinary people, it is more appropriate to change the washing every 1-2 days.
If possible, it is best to insist on changing once a day. Even though the socks are very clean and refreshing all day, there are still a lot of bacteria invisible to the naked eye. If you sweat easily, you must change it every day. If your feet are not particularly prone to sweating, and you are lazy, 2 days is fine, but it is best not to exceed 3 days. If you have athlete's foot or sweaty feet, it is best to change it every half a day, and change your shoes frequently. And special circumstances, such as socks must be replaced in time after exercise. In addition, if it is a baby, the baby loves to move, the feet are prone to sweating, and it is easy to get frostbite when sweating, so it is recommended to change the socks or shoes for the baby several times a day.