Under normal circumstances, the size of lymph nodes will not exceed 0.6 cm. If a lymph node is the size of a soybean, you can determine whether the lymph node is diseased by pressing on it. If the lymph nodes are soft, with clear borders and do not cause pain when pressed, the lymph nodes are normal. If the lymph nodes are hard and painful when pressed, the lymph nodes have problems. The common cause is inflammation that causes swollen lymph nodes, which can be treated with oral antibiotics, such as cephalosporin or penicillin, and the lymph will return to normal size after the inflammation subsides. At the same time, malignant tumors can also cause swollen lymph nodes and painful symptoms. In this case, patients need to go to the hospital for laboratory tests to confirm the location of the tumor, and then remove the tumor through surgery, combined with chemotherapy treatment, so as to achieve the effect of recovery.