There are no disadvantages of biliary stenting, but we may want to know what are the adverse reactions or unexpected situations after and during the biliary stenting process. Biliary stent is the same as digestive stent, esophageal stent or pyloric stent, there are some adverse reactions during and after the biliary stent, that is, the patient is a little uncomfortable, but most of the patients can tolerate it after a few days. If the disease progresses, the biliary stent may be narrowed again, and the biliary tract may be narrowed again, and the tumor will easily cause the biliary tract to be narrowed again, and the tumor will grow in along with the stent, or the stent will grow out again, so that the biliary tract will be narrowed again. If the stent is not positioned well after the procedure, or if the stent is displaced due to the patient’s personal factors after the procedure, the displacement can be dealt with if the patient is reviewed on time after the procedure. In the process of doing so, there may be some biliary tract reactions or mucosal reactions of the bile ducts, some bloody bile or bleeding, and these problems can be solved immediately by doing some biliary tract flushing and treatment during the process of doing so. Therefore, there is no big adverse reaction or fatal biliary stent, but of course, we should go to an experienced hospital and experienced doctors to do it. If the bleeding is large, it may be life-threatening. Therefore, if the biliary stent is done well before, if there is sufficient preparation for the work, and if the process is done carefully and gently, there will not be any big reaction.