Why does spring make you feel tired?

If you have found yourself fighting off yawns despite getting a full night’s sleep, you are not alone. As the weather warms and sunlight stretches into the early evenings, many begin to feel unusually drowsy or sluggish. In Korea, this familiar seasonal fatigue is commonly called "chun-gon-jeung," which literally translates to "spring tiredness." Doctors stress that this isn’t a disease but a physiological adjustment period. As winter transitions into spring, the body is suddenly asked to recali