The precautions after a child’s arm fracture include: 1. A child’s arm will be fixed to some extent after the fracture. The role of fixation is to enable this limb to be repaired, and then it will no longer be affected by external forces. So after the fracture, we should pay attention to the child’s activities, not too strenuous, not re-injured, this is the first thing to pay attention to; 2, to observe the child’s limb is the arm, especially the distal fingers of the blood flow, there is no swelling? Is the blood flow good? Is the color of the hand red? If there are these problems, we should consider whether the plaster fixation or splint fixation is too tight after causing the obstruction of blood flow; 3, we should move the child’s fingers more often to see if there is nerve damage, and to promote blood circulation. Frequent movement of the finger can also promote the swelling to subside; 4. It is a common problem that children cannot enter water after bathing, if they are fixed.