Appendicitis drainage fluid red to yellow, is the normal color change of drainage fluid. Some patients after appendicitis surgery, will be placed in the drainage tube, the drainage tube initial discharge of red fluid refers to the bloody fluid, followed by yellowish fluid, the final drainage of the fluid is bright color appears, is a normal phenomenon. Most appendicitis surgery does not need to be placed after the abdominal drainage tube, when the patient has a large area of pus or appendix perforation and other phenomena, the abdominal cavity has been infected, the postoperative will be placed in the drainage tube, the discharge of infected exudate in the abdominal cavity, until the discharge of the liquid is clearer, basically restored to the normal state will not be pulled out after the tube. After appendicitis surgery, patients should pay attention to a balanced diet, maintain a good state of mind, and consult a doctor when they feel unwell.