If the stomach is soft and even there is intestinal outflow after delivery, the rectus abdominis must be repaired, but the above symptoms are rare. Pregnancy can cause separation of rectus abdominis, but usually it can recover itself after delivery. If the fascia is firm, it will not cause intestinal intumescence and intestinal incarceration, and there is no discomfort change, so special treatment is not needed. When the rectus abdominis is separated, it will show that the stomach is big and soft and the appearance is not good. At this time, it can be repaired as cosmetic surgery, but there will be side effects during the operation. If it does not affect normal life, and it is not the separation of rectus abdominis that causes intestinal dysfunction, it is recommended not to operate. If there is intestinal obstruction, incarceration and intestinal obstruction, surgery must be performed. Abdominal muscle exercise should be actively carried out after delivery, which is helpful to repair rectus abdominis.

1. The rectus abdominis is located in the sheath of rectus abdominis on both sides of the midline of the anterior abdominal wall. It is a kind of banded abdominal muscle with wide upper part and narrow lower part, which starts from pubic symphysis and pubic crest, and the muscle fibers stop in front of sternal xiphoid process and 5-7 costal cartilage. The average length is 26 cm and the width of the midpoint is 8 cm. During contraction, the spine bends forward and tightens the abdominal wall, and it gets nutrition from the superior and inferior epigastric arteries. The inferior epigastric artery branches from the external iliac artery above the inguinal ligament, accompanied by two veins, which run inward and upward, enter the rectus abdominis from the outer edge of the rectus abdominis at the arcuate margin, run between the rectus abdominis and the posterior sheath, and go up to the navel to form a terminal branch, and form a wide communicating branch around the navel with the terminal branch of the superior epigastric artery at the upper end of the rectus abdominis.

Second, the blood supply of abdominal skin is related to tissue structure. The blood supply of the upper and middle skin in the anterior abdominal wall is mainly the perforating branches of the superior abdominal artery and the inferior abdominal artery; The lower part is the superficial blood vessels in inguinal region, including branches of inferior epigastric artery, superficial circumflex artery and superficial external pudendal artery. The branches of these arteries coincide with each other, and the large-diameter musculocutaneous artery near the umbilicus has more perforating branches, and the middle and upper perforating branches are more than the lower ones. The innervation of rectus abdominis is segmental. The nerve innervating rectus abdominis is the anterior branch of T6 ~ LI spinal nerve. These nerves run between the internal oblique muscle and transverse abdominal muscle on the anterolateral abdominal wall, form a bundle before entering the posterior sheath of rectus abdominis, and then pass behind rectus abdominis, often entering the muscle at the junction of 13/.

Three, rectus abdominis mass can be divided into inflammatory lesions, tumor-like lesions and redundant lesions. Inflammatory lesions include nonspecific infection, specific infection and focal myositis, and specific infection includes tuberculosis abscess, Brucella abscess and parasitic abscess. Tumor-like lesions include hematoma, endometriosis and vascular malformation. Tumor lesions include benign and malignant tumors. Benign tumors mainly include desmoid tumor, hemangioma, lipoma and hemangioma. Primary malignant tumors are rare, mainly fibrosynovial sarcoma and acinar soft tissue sarcoma. And the secondary mainly includes metastatic tumor, lymphoma, leukemia and so on. Metastatic tumors can be formed by direct invasion, incision metastasis and systemic metastasis.