More than 10 years after the operation, the muscle layer is hardened and puckered, which may be related to the local fiber rupture or hematoma formation mechanism. 1. Local fiber rupture: more than 10 years after the operation, due to the local muscle contraction can lead to local muscle fiber rupture, local hard lumps can appear, this situation is longer, may lead to the occurrence of adhesion, if necessary, can be treated surgically. 2. hematoma formation mechanization: a part of the patient to form a local hematoma and lead to the mass, the mass boundary is relatively clear, it is recommended that you can carry out hot compresses, observe whether the mass gradually disappears, if necessary, you can choose surgery for treatment. Surgery years later found that the formation of localized hard lumps may have other reasons, it is recommended to consult a regular hospital, improve the examination, a clear diagnosis and then follow the doctor’s instructions for treatment.