There is no need to be nervous when there is a rejection reaction after surgery, just pay attention to keep the hygiene of the incision area and go to the hospital in time. Post-surgery thread reaction refers to the tissue at the surgical incision to the surgical suture rejection reaction, and is related to personal constitution. In general, the threads need to be removed after surgery, and during the period of time, the wound should be changed regularly to avoid causing wound infection. During the period of suture removal, patients should pay attention to local hygiene, regular disinfection, change the medicine to avoid infection. Also avoid squeezing and friction, do not eat spicy food, quit smoking and drinking. The reaction of thread-drainage is mainly manifested as wound ulceration, oozing, sometimes black threads can be seen, when the above situation occurs, it is recommended to consult the doctor in time to avoid delaying the condition.