Hello, you can do breast plastic surgery after mastectomy due to illness, that is, breast reconstruction. The treatment of breast reconstruction is not very complicated, that is, after mastectomy, the prosthesis filled with silica gel, silica gel or normal saline is placed under the flap or pectoralis major muscle. If after mastectomy, the local tissue can't provide enough cavity to accommodate the prosthesis with the required size, a skin dilator can be placed first, and water can be injected regularly after operation. When enough cavities are formed, breast reconstruction can be performed, and breast prosthesis can be used instead of dilator.