It refers to masses of organs and tissues inside and outside the abdominal cavity due to various causes. Cystic inflammatory masses in the left upper abdomen with obvious pressure pain, such as masses palpated in the middle of the epigastrium are often tumors of the stomach or pancreas, cysts or stones in the stomach. Causes of cystic mass with pressure pain in the left upper abdomen: 1. enlarged liver: such as hepatitis, liver abscess, liver tumor, liver cyst, splenomegaly, wandering spleen, parasplen, pancreatic tumor, pancreatic cyst, etc. 2.Gallbladder enlargement: such as acute cholecystitis, gallbladder effusion, gallbladder hematoma, bruised gallbladder enlargement, primary gallbladder cancer, gallbladder torsion, etc. 3, masses caused by kidney diseases: such as renal prolapse and wandering kidney, congenital renal cyst, hydronephrosis, renal inclusion cyst, renal tumor, etc. Masses in certain locations often originate from the organs of the department, such as masses in the middle of the epigastrium are often tumors of the stomach or pancreas, cysts or stones in the stomach; masses under the right rib cage are often related to the liver and bile; masses in the abdomen on both sides are often tumors of the colon; irregular, painful masses around the umbilicus or in the right lower abdomen are often intestinal adhesions due to tuberculous peritonitis; round, movable, painful masses on both sides of the lower abdomen may be enlarged abdominal lymph nodes The masses above the inguinal ligament may be from the oval set and other pelvic organs.