患儿男,4岁3个月。因反复发热2年9个月入院。患儿于18个月时,无任何诱因出现发热,体温波动在37.5℃～40℃,高热时伴畏寒、四肢冷、面部潮红,服退热药后,热退数小时,多汗。每次发热持续1周左右,间歇5～6天。平时偶有呼吸道感染,无其它异常。患儿系第2胎,足月顺产,智力发育与同龄儿相仿。体检:体温39℃,呼吸25次/分,脉搏140次/分, Children male, 4 years and 3 months. Due to repeated fever 2 years and 9 months admitted to hospital. Children at 18 months, without any incentive fever, temperature fluctuations in the 37.5 ℃ ~ 40 ℃, high fever with chills, limbs cold, facial flushing, antipyretics, the heat back a few hours, sweating. Each fever lasts about 1 week, intermittent 5 to 6 days. Occasionally occasional respiratory tract infection, no other abnormalities. Children in the second child, full-term birth, mental development and children of the same age. Physical examination: body temperature 39 ℃, breathing 25 beats / min, pulse 140 beats / min,