The entire process from the end of the needle closure type of surgery until healing and recovery is called the postoperative observation phase. The normal reactions and complications that occur during this time period are the subject of this chapter. Needle knife surgery has its own special characteristics, so the method of postoperative treatment also has its own characteristics. After the needle knife surgery, it is still necessary to closely observe the postoperative reactions, any new problems such as complications, and, at the same time, to prepare for the continuation of treatment. Even if the treatment has ended, there is still a long term effect follow-up to be done. A doctor who does not know what kind of effect he or she has treated and how many days this effect can be maintained, and who does not know the recent effect, let alone the long-term effect, is certainly not a good doctor. Technically speaking, postoperative management is much more complicated than preoperative preparation. All kinds of reactions may occur after needle knife closed type surgery, which may be faster heart rate, may be a little dizzy; there are also bleeding and hematoma problems; there are no incision reactions, needle eye infection, abscess formation; and even mental and neurological reactions. These problems should not only be carefully observed, but also be able to make timely and accurate judgments, and more importantly, be handled early without losing time in order to achieve satisfactory results. For example, certain salvage surgeries (such as tracheotomy, etc.) are time-limited, and if the timing is missed, the hope of recovery is lost and can only be regretted for life. Therefore, it is hoped that doctors will acquire more knowledge and skills in this area to create good conditions for the recovery of patients. Acupuncture treatment operation is surgery, it necessarily has the general law of general post-surgery. The stimulation of the surgical operation will cause a series of changes in the cardiovascular and other systems, such as accelerated heart rate, increased metabolism, the function of certain organs in a state of inhibition; then enter a period of disorder, and only then enter a period of recovery, and gradually return to the original normal functional state. Needle knife closed type surgery also fully conforms to these rules. Because of the tiny incision, the invasion of normal tissues is slight, and the cutting and stripping of diseased tissues is also small, thus the overall interference to the patient is very small. Therefore, the majority of patients have minimal postoperative reactions, and some have little to no discomfort. Only those sites with large stripping areas that are extremely sensitive to irritation will have a greater reaction. Some of the serious symptoms such as hematoma, infection, and nerve entrapment that occur after surgery are postoperative complications. This chapter discusses postoperative observations along with the causes, manifestations, management, and prevention of complications.