Lymph nodes are peripheral immune organs and are the site of lymphocyte proliferation and differentiation. Normal lymph nodes are very small, if the lymph node shape changes, the texture is abnormal is called lymph node enlargement, may be due to infectious and non-infectious factors. It is recommended to consult a doctor in time to clarify the cause of the disease. 1. Infectious factors: Lymph and its surrounding organs are infected by bacteria or viruses, causing acute lymphitis, acute pharyngitis, tonsillitis and other diseases, or the patient is infected with tuberculosis and develops lymphatic tuberculosis, which will lead to localized lymphatic enlargement or nodules. 2. Non-infectious factors: Lymphatic metastasis caused by liver cancer, lung cancer, lymphoma and other malignant tumors can also lead to lymph node enlargement. It is suggested that patients with enlarged lymph nodes should go to the hospital for relevant laboratory tests in time and follow the doctor’s instructions to standardize the treatment, so as to avoid delaying the condition.