Lymphadenitis is divided into non-specific and specific, and different types of lymphadenitis have different local and systemic symptoms. 1. Non-specific lymphadenitis: Non-specific lymphadenitis is divided into acute and chronic. The local symptoms of acute course include redness and swelling of the lesion lymph nodes, pain, fever, fatigue and other systemic symptoms, lymph nodes have tenderness, smooth surface and poor mobility; patients with chronic course have a longer duration of illness, and there may be local symptoms such as hardening and swelling of the lymph nodes. 2. Specific lymphadenitis: Specific lymphadenitis is divided into tuberculosis infection, fungal infection, rickettsial infection and viral infection. Fungal infection will have local symptoms such as redness, swelling, heat and pain of lymph nodes; rickettsial infection will have local symptoms such as erythematous papules and pustules; viral infection will have local symptoms such as enlarged lymph nodes and hepatosplenomegaly, as well as systemic symptoms such as fever and malaise. In addition to enlarged lymph nodes, tuberculosis infection is easy to break, accompanied by low fever in the afternoon, night sweats (sweating abnormally after going to sleep, and sweating stops after waking up), loss of appetite, weight loss, and other systemic tuberculosis poisoning symptoms. Patients with lymphadenitis need to go to the hospital in time for standardized treatment.