Cervical lymphadenitis can cause fever, which varies according to the progression of cervical lymphadenitis, both acute and chronic. For example, in acute cervical lymphadenitis, the initial systemic reaction is minimal or low fever, usually below 38°C. After the formation of septic abscess, high fever may occur, accompanied by other symptoms such as chills, headache, general weakness and loss of appetite; in subacute necrotizing cervical lymphadenitis, the first symptom is a sudden high fever of unknown origin, with a fever pattern of retention or flaccid fever; in chronic cervical lymphadenitis, fever may also occur if there is a primary lesion. Simple chronic cervical lymphadenitis is not usually associated with fever.