Numbness of children’s feet may be caused by improper posture, blood circulation disorders, B vitamin deficiency and other reasons. 1. Improper posture: If children play with cell phones in the bathroom or squat on the toilet for too long, it will lead to a decrease in blood supply to the lower limbs, which will lead to numbness of the feet. 2. Blood circulation disorders: poor local blood circulation, such as varicose veins of the lower limbs, vasculitis, etc. will lead to local blood circulation disorders, the symptoms of numbness. 3. B vitamin deficiency: B vitamin deficiency can cause nerve nutrition and metabolic dysfunction, can lead to peripheral neuritis, resulting in numbness of the hands and feet. If the symptoms of numbness in children’s feet do not improve for a long time, they should go to the hospital as soon as possible for timely treatment.