There are many causes of lymph node reflux obstruction, as follows: First, it may be caused by a serious bacterial infection, because when there is a serious bacterial infection, a bacterial plug may lead to lymphatic vessel obstruction. In this case, antibiotics should be actively given for treatment, commonly used drugs are cephalosporin antibiotics or penicillin antibiotics, and sometimes anti-anaerobic drugs are also needed for treatment. Secondly, it may be caused by fungal infection, which needs to be treated with antifungal drugs. Some patients can also be treated with traditional Chinese medicine, the effect is better. Thirdly, it is caused by tumor factor. When tumor grows in the body and the tumor cells grow more, it will cause the cancer cells to block the lymphatic vessels, which will also cause the corresponding symptoms, such as lymphatic edema. Fourthly, some patients have lymphatic reflux obstruction due to external pressure on the mass, which also needs to be checked by CT for clarification.