The main causes of crossed index middle fingers in children include the following: first, children with cerebral palsy. Children with cerebral palsy will have high muscle tone, and in addition to the scissor gait of the lower limbs, they will also have crossed index and middle fingers, and even a pronounced internal clasp of the thumb, which can lead to timely rehabilitation. Secondly, children with calcium deficiency have symptoms. Calcium deficiency in children can cause hand twitching and crossed index fingers if the calcium deficiency is obvious. Children need to be given timely calcium supplementation treatment, such as the application of calcium gluconate to children. Finally, due to bad habits.