Phase I breast reconstruction may have the risk of allergy, implant displacement, infection and other risks, the specific situation also need to go to the hospital for relevant examination. 1. Allergy: When patients undergo breast reconstruction, there may be the risk of allergy, such as redness, swelling, fever, pain and other uncomfortable reactions after the operation, and in serious cases, they should go to the hospital to take out the implant, so it is recommended that patients with hypersensitive body should carry out breast reconstruction under the guidance of the doctor. 2. Displacement of implant: If the surgeon operates improperly or does not take proper and effective care of the implant after the operation, there is also a risk of implant displacement. When the above situation occurs, it is recommended to go to the hospital for relevant checkups, and restore the implant to its normal position through surgery. 3. Infection: patients who do not operate properly when doing the surgery or improper care in the later stage may also cause the risk of infection, if there is a serious infection, this should be under the guidance of the doctor to carry out local dressing and anti-infection treatment, such as the application of penicillin, cephalosporin and other drugs. It is recommended that postoperative actions such as chest expansion exercises should be avoided, and regular visits to the hospital for rehabilitation checkups and so on. If there is any discomfort, consult a doctor in time and do not take medication without authorization.