Compulsive lying on the back is a position in which the patient lies on his back with his legs flexed to relieve tension on the abdominal muscles in order to relieve the pain of the disease. It is commonly seen in acute peritonitis. Secondary peritonitis Acute perforation and rupture of intra-abdominal organs: the most common cause of acute secondary peritonitis. Perforation of cavernous organs often occurs suddenly due to progression of ulcerative or gangrenous lesions, e.g., acute appendicitis, peptic ulcer, acute cholecystitis, typhoid ulcer, gastric or colon cancer, ulcerative colitis, ulcerative intestinal tuberculosis, amebic bowel and diverticulitis. 1.Symptomatic examination is often accompanied by flexion of the legs to reduce abdominal muscle tension. The main clinical manifestations are abdominal pain, abdominal pressure, abdominal muscle tension and rebound pain, often accompanied by nausea, vomiting, abdominal distension, fever, hypotension, rapid pulse, shortness of breath, leukocytosis and other toxic phenomena. Because the disease is mostly a complication of a disease in the abdominal cavity, there are often symptoms of the original disease before and after the onset of the disease. Check the blood in urine, ultrasound, etc. 2.Blood routine Blood routine is the most general, the most basic blood test. Routine blood tests are usually done with peripheral blood, such as blood from the fingertips and earlobes. After the blood cell analysis instrument, the computer reports the results, and this item has become a practice to examine patients. Blood consists of two major parts, liquid and tangible cells, and routine blood tests are performed on the cellular part of the blood. Blood has three different functions of cells – red blood cells (commonly known as red blood cells), white blood cells (commonly known as white blood cells), and platelets. Diseases are determined by observing changes in number and morphological distribution. It is one of the common auxiliary tests used by doctors to diagnose the condition.