Plaster has been used in medical science for a very long time and has made a great contribution to the development of orthopedic medicine, and still plays an irreplaceable role today. In pediatric orthopedics, plaster is more widely used. It is mainly used for: fracture repositioning and fixation, orthopedic correction of congenital clubfoot, fixation of hip dislocation after repositioning, fixation of bone lengthening, correction of limb deformity and so on. At present, the plaster used in clinical practice is mainly the traditional calcium sulfate plaster and the lightweight polyester plaster. There are various forms of plaster fixation, depending on the treatment needs. For example: plaster rest, tube plaster, plaster splint, etc. Regardless of the type of cast and the form of cast fixation, the care of the cast is basically the same. The duration of cast fixation varies, depending on the treatment needs. It can be as short as 1 week or as long as 1 to 2 months. During the period of cast fixation, it is not necessary to always stay in the hospital, so more time is spent at home, so the home care of the cast is crucial. Especially in children, who are active and less cooperative and compliant, care is more difficult and the importance of care is more prominent. Most parents know very little about the care of plaster, and need to know more about the following 1.Before the cast is dry: put the fixed limb on soft clothes or pillow to prevent squeezing the cast and compressing the limb. During the dry process of the cast, you cannot hold the cast with your fingers, otherwise, it will leave a depression on the cast, and the depression will compress the limb below. When you need to hold it, you should gently hold it up with your palm. 2.After the cast is dry and knotted: the doctor will record the child’s name on the cast, the date of the cast, the expected date of the cast change or cast removal, etc. Children who like to draw can also draw their favorite pictures on the cast by themselves. 3. The affected limb should be properly elevated: for example, the lower limb can be placed on a pillow, which is powerful for blood return and is conducive to the swelling of the limb. The upper limb should be suspended and fixed. 4. Observe the blood circulation at the end of the limb: under normal circumstances, the fingers or toes are red and moist, and after compression, they turn white locally, and when the hand is released, they will quickly become engorged with blood and turn pink. If the end continues to be white or purple, it means that the blood circulation of the limb (arterial ischemia or venous return obstruction), it is necessary to notify the attending doctor immediately and take measures, either to open the window for examination, or to separate and loosen the cast, or to remove the cast and refix it. 5.Observation of the presence of plaster pressure injury: children will not accurately describe, exactly which location has pressure pain, and the description of pain is not well expressed, so the parents’ observation is the main means. The main phenomena of concern are: whether the child is crying abnormally, whether he can’t eat milk and sleep on time, whether there is any abnormal smell inside the cast, etc. All these need to be communicated and handled with the doctor in charge in time. 6, keep the cast clean: especially the lower limb cast, to pick up the child’s urine and stool on time, rural children, pay attention not to let the mud, gravel and small branches into the cast. Because the contaminated plaster on the one hand, the fixed strength decreases, affecting the therapeutic effect, on the other hand, the dirt will irritate the skin, the child will be very uncomfortable, and the long time foreign body irritation will also occur skin ulcers, rupture, lacerations and dermatitis. The contaminated plaster needs to be replaced, even if it costs some money. 7, plaster edge skin care: usually when playing the plaster, the doctor is the edge of the plaster with a liner turned up, to protect the skin, to prevent stabbing skin, or friction skin. If the edge of the cast is found to be exposed, it needs to be wrapped with cotton products. 8. Observe and mark the position of the cast at the end of the limb: After the acute period (about 1 week after the injury), the limb will swell and the cast will be loosened accordingly, and if the position changes significantly, it needs to be re-fixed. Children with horseshoe foot, in the early stage of orthopedic, the foot sagging is not corrected, the cast will happen to fall off, especially those obese children with thick thighs, small feet and tapered lower limbs, the cast is more likely to fall off, which needs to be re-plastered, in this case the cast needs to be flexed at a larger angle, which has the effect of preventing the cast from falling off. 9, replace or remove the cast on time: marking the date in the cast is a good way. It prevents parents from forgetting the time to replace the cast or remove the cast because of busy work. 10.Bathing and personal hygiene: It is difficult to do good personal hygiene during the child’s cast, especially in the hot summer. Ordinary calcium sulfate plaster is softened by water, so avoid contact with water. Polyester plaster is waterproof, however, the cotton lining inside the plaster absorbs water, so it should not be completely exposed to water either. Therefore, it is basically impossible to bathe a child with a cast. Some people, who wrap the plaster with a waterproof material such as a plastic bag to bathe the child, in fact, are not very reliable either. It is recommended that the child be given a good personal hygiene by means of a rubbing bath, and in summer, the temperature of the room should be adjusted to a comfortable level to reduce the child’s sweating.