Lymphatic cysts are usually cystic lymphangiomas. Usually still lymphangiomas do not heal on their own and require prompt medical attention to receive treatment. The cause of cystic lymphangioma is not clear, it may be caused by factors such as blockage of lymphatic vessels and abnormal development of lymphatic vessel cells. The appearance of cystic lymphangioma can be seen as a large multilocular cystic mass, but the symptoms may vary depending on the location of the mass, such as restricted head and neck movement, swallowing disorders, and difficulty in breathing. Although cystic lymphangiomas are benign lesions, they can affect the surrounding tissues and even the growth of polyps in major organs, and may even be life-threatening in a short period of time, so they generally cannot be cured on their own. If the lesion is relatively small and the body does not have any symptoms, it does not need to take any treatment measures, as long as the regular follow-up observation in the hospital can be. However, if the lesion is large, or appears to be enlarged during the review process, it is necessary to take timely and appropriate treatment measures.