Children with cast wetting treatment measures should be decided according to the specific situation. Local slight wetting does not need to do special treatment; plaster part of the large wetting need to consult the doctor in time, by the doctor to give re-wrapping fixed. 1. Most of the casts for children are for external fixation of fracture or local injury, and slight wetting of the cast part can be treated without any special treatment, which generally will not affect the effect of external fixation. 2. If the child cast part is wet by urine area is relatively large, affecting the local external fixation effect, need to consult the doctor in time, remove the original cast by the doctor according to the child’s condition to re-fix, to ensure the safety of the operation. It is recommended that parents should strengthen the care of children during the period of plaster fixation, avoid local water or wet urine, and find abnormalities and consult a doctor in time to avoid affecting the treatment effect.