Chin-chin lymph nodes have not gone down for a long time, it may be caused by the infection factors are not completely removed, the enlarged lymph nodes have not subsided completely, the specific circumstances are as follows: First, the infection factors are not completely removed: there may be both bacterial infection and viral infection, you need to go to the hospital to further improve the relevant examinations, such as routine blood, C-reactive protein, ultrasound or CT, and so on, and some patients need to do the lymph node puncture biopsy or excision biopsy to clarify its nature. Some patients also need to do puncture biopsy or excision biopsy of lymph nodes to clarify their nature. If it is considered to be caused by dental infection, first of all, you need to deal with the teeth, or even extract the teeth, so that the enlarged lymph nodes can gradually subside, if it is due to the infection has not been removed completely, you need to give medication, and at the same time, appropriate to drink more warm water, appropriate intake of fresh fruits and green vegetables. Second, the enlarged lymph nodes have not subsided completely: it may be caused by multiple fusion of enlarged lymph nodes that have not subsided completely, then don’t worry too much, go to the hospital regularly for observation.