Whether a lymph node cyst is serious or not is based on the location, size and clinical symptoms of the lymph node cyst and a comprehensive assessment. First, if the lymph node cyst is small in size and relatively superficial in location, it does not cause symptoms of compression. At this time, the impact on the human body is small and will not cause serious complications, so patients can take the approach of regular review and do not need surgical removal. Secondly, if the lymph node cyst is larger in size and close to important organs and blood vessels, it has a certain degree of compression symptoms on the surrounding tissues. If the lymph node cyst increases progressively, it will have a serious impact on the human body, and patients are advised to have it removed surgically as soon as possible to avoid serious complications.