Submaxillary lymph nodes usually need to be examined by laboratory tests, physical examination, ultrasonography and pathological biopsy. 1. Laboratory examination: mainly through the routine blood, urine and cerebrospinal fluid examination to determine the health status of white blood cells and body organ function, such as suspected malignant or connective tissue disease, but also need to carry out the corresponding tumor markers, immunoglobulin and other tests. 2. Physical examination: mainly observe whether the submandibular lymph nodes are enlarged, pressure, tenderness, texture, mobility and so on. 3. Ultrasonography: it can know the size of the lymph nodes, blood flow, echo and whether the dermatomal stroma is clear. 4. Pathological biopsy: if the above examinations fail to make a clear diagnosis, it may be necessary to perform puncture sampling and pathological biopsy to examine the patient. To summarize, if you want to examine submandibular lymph nodes, it is recommended to go to regular hospitals for examination.