Lymph node inflammation fever after antibiotic injection may be caused by allergy, secondary infection and other factors, which can be combined with the cause of the disease to take general treatment, drug treatment. 1. Drug allergy: some patients are allergic to antibiotics, direct injection without skin test, may cause anaphylactic reaction after antibiotics, resulting in body fever and fever. You can observe first, if the allergic reaction is more serious, then follow the doctor’s instructions to take oral antihistamines, such as cetirizine, clomid; and then observe the body temperature, when the temperature is more than 38.5 degrees, you can take ibuprofen, acetaminophen and other antipyretic drugs. 2. Secondary infection: If disinfection is not thorough during the injection of antibiotics or local care is not paid afterwards, secondary infection will be caused, which is easy to recur with repeated fevers and fever. At present, you can use iodophor or scrub the wound with alcohol to reduce the secondary infection. If it belongs to low fever, it can be physically cooled down first, such as alcohol rubbing, ice packs and so on. Lymphadenitis patients should be regularly observed after antibiotics, if the condition is too serious to be treated by oneself, it is recommended to seek medical treatment, and the specific medication should also be under the guidance of the doctor.