The causes of acute lymph node inflammation may be related to bad habits, decreased immunity, bacterial infection, bad mood and other factors, as follows: 1, bad habits: such as eating spicy, greasy, stimulating food for a long time, and smoking, drinking, often stay up late, fire, mental stress, lack of adequate sleep will lead to lymph node inflammation; 2, decreased immunity: lymph nodes are the body’s immune tissue. Lymph nodes are the immune tissue of the human body, and when immunity drops and the body’s resistance drops, the lymph nodes will become enlarged and inflamed; 3, bacterial infection: acute upper respiratory tract infection or acute otitis media, if it is not treated in a timely manner, the bacteria will easily invade the surrounding tissues and cause lymph node enlargement; 4, bad mood: such as temper, anger, can also lead to acute inflammation of the lymph nodes.