Lymph nodes are distributed all over the body and are mostly 0.2-0.5 cm in diameter, exceeding this range indicates enlarged lymph nodes. If 2cm lymph nodes are fine according to the doctor, it may be a temporary enlargement of lymph nodes due to physiological factors. However, the severity of lymph node enlargement cannot be judged solely by the size of the lymph nodes, but must be determined according to the cause of the disease. If the lymph node is 2cm caused by pathological factors, the cause needs to be clarified for targeted treatment. Physiological factors: Staying up late, eating spicy and irritating food, mood swings and other factors can cause lymph node enlargement, and some of them can reach 2cm, which are mostly transient enlargement and can be relieved by rest, emotional adjustment and diet adjustment. Usually, it will not have any obvious impact on health and will not be accompanied by obvious discomfort, so there is no need for special treatment and no need to worry excessively. The lymph node enlargement caused by benign lesions is usually soft in texture, with clear borders and good mobility. Patients are advised to seek timely medical treatment for the cause, and take antibiotics and antifungal drugs as prescribed by the doctor for infectious diseases, and benign lesions generally have a better prognosis; 2. Malignant: usually caused by lymphoma and malignant tumor metastasis of other tissues and organs, malignant lymph node enlargement usually has poor mobility and adhesion with surrounding tissues. Patients are advised to seek medical attention in a timely manner, perform puncture biopsy to clarify the cause, and actively treat the disease. In case of Hodgkin’s lymphoma, carcinoma and other malignant lesions resulting in 2cm lymph nodes, the prognosis is relatively poor, and failure to treat them can be life-threatening, requiring surgery as well as radiotherapy and chemotherapy.