Recurrent asthma symptoms frequently cause sleeplessness, daytime fatigue, reduced activity levels and school and work absenteeism.

周期性哮喘症状往往导致失眠、日间疲劳、减少活动量，不能上学和工作。

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If you are suffering from headaches, fatigue, and recurrent infections, it may be underload syndrome.

如果你有头痛、疲劳、和容易生病的状况产生，那可能是因为过低的挑战感所导致的症状。

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