The unsuitable people for playing plaster include patients with mental illness, patients with obvious swelling of limbs, infants, young children and the elderly, patients with allergy to plaster, patients with poor general condition, patients with localized infections and pregnant women, etc. The details are analyzed as follows: 1. patients with mental illness: if there is a mental illness will cause poor control of the limb, unconsciousness, can not cooperate with the treatment, playing the plaster will often lead to adverse consequences. 2. Patients with obvious swelling of limbs: due to injury or fracture produce obvious swelling of limbs with tension blisters, at the same time, the distal limbs appear numbness, coldness, dysfunction and other symptoms, there may be osteofascial compartment syndrome, this kind of people is a contraindication to the cast of patients. 3. Infants, young children or the elderly: due to poor care, playing the plaster may also cause adverse consequences, such people in the lack of care is not suitable for playing the plaster. 4. Patients with allergy to plaster: people who are allergic to plaster belong to the contraindication group of playing plaster. 5. Patients with poor general condition: such as cardiac, pulmonary, renal insufficiency or patients with progressive ascites are not suitable for playing plaster. 6. Patients with localized infection: there are anaerobic infections in the part of wound where plaster is to be played. 7. Pregnant women: pregnant women should not do abdominal plaster fixation.