For amputees, why should they timely install prostheses after amputation? Timely installation of prosthesis can reduce the pain of patients and enable them to take care of themselves as soon as possible. If the installation is delayed or even not assembled, this can cause more psychological stress to the patient. Therefore, it is recommended that the sooner the patient is fitted with the prosthesis, the better the patient's functional recovery and psychological adaptation will be, and more conducive to helping the amputee to overcome the pain of phantom limb sensation and phantom limb pain. Early prosthetic assembly allows patients to integrate the prosthesis into their body image, allowing them to focus on the acquisition of function rather than bemoaning the loss of a limb.

Amputees have little opportunity to exert the strength of the stump after surgery and before the prosthesis is fitted, making it very easy to develop disuse atrophy of the muscles. Most residual limb people after surgery often with a pillow will stump pad, sometimes will be used to knee joint and hip joint in the flexion site, so that the opportunity of joint flexion contracture is greatly increased, surgery after one to two weeks may occur. After that, the flexion and extension of the joints and the fluency of the limb swing are affected by the installation of the prosthesis, as well as the aesthetics of the prosthesis and walking.

If the lower limb is unfortunately amputated, because the limb is out of balance, the person will try to maintain balance, and produce a bad limb tilt and scoliosis. As time goes by, it will deform the chest cavity and cause internal organs to be compressed and damaged. If the knee joint after leg amputation has the trend of flexion, in order to reduce the pain, the patient often unconsciously adopt to promote this kind of bad body position, in the future when the artificial limb will produce flexion position contracture to carry on the normal life after the cause of unnecessary trouble. Therefore, the next day after amputation, to adhere to several times a day prone and mirror before correction training. Wear artificial limbs as soon as possible and avoid bad posture.