春困这一现象，在英语中可被译为spring fatigue1或spring lethargy，有时也被称作spring fever。
据维基百科讲解，春困是指与春天到来有关的疲劳、精力降低或抑郁的状况。这种状况或许是对气温升高的正常反应，可能有医学依据，如过敏或 逆向季节性情感障碍等。
Spring fatigue, also known as spring lethargy, refers to a state of fatigue, lowered energy, or depression, associated with the onset2 of spring. Such a state may be caused by a normal reaction to warmer temperatures, or it may have a medical basis, such as allergies3 or reverse seasonal4 affective disorder5.
致使春天嗜睡是什么原因还没完全被弄清，荷尔蒙的平衡可能是其中之一。依据这一假说，人体储存的快乐荷尔蒙血清素（其产生依靠于日光）在冬天被消耗殆尽，这使得睡眠荷尔蒙褪黑激素特别容易发挥用途。当春季到来，白天愈加长，身领会重新调整激素水平。这种转换给身体带来了沉重的重压，身领会感到疲劳。
Although the causes of this springtime lethargy have not yet been fully6 resolved, hormone7 balance may play a role. According to this hypothesis, the bodys reserves of the happiness hormone serotonin, whose production depends on daylight, become exhausted8 over the winter, making it especially easy for the sleep hormone melatonin to have its effect. When the days become longer in springtime, the body readjusts its hormone levels. This changeover puts a heavy strain on the body, which responds with a feeling of tiredness.
专家表示，春困是人体机能随季节和气温变化而自己调节的一种生理现象。除未休息好以外，春困或是心血管类疾病的示警，如高血压、冠心病或糖尿病等。
Experts say that spring lethargy is a physiological9 phenomenon involving seasonal and temperature changes and the bodys own regulation. Besides not resting well, spring lethargy could be a warning sign of cardiovascular diseases, such as hypertension, coronary heart disease, or diabetes10.
除此之外，长期熬夜、酗酒等不好的生活习惯，也容易引发心血管类疾病，身领会通过春困来示警。假如排除常常熬夜、睡眠不足、过度疲劳等，依然频繁春困，应引起看重、准时就诊。
In addition, not getting enough sleep, drinking excessive amounts of alcohol, and other bad habits, are also linked to cardiovascular diseases. If you engage in any of these habits and notice increased springtime lethargy, it may be a warning sign that you should seek medical help.
