Holiday packing is often stressful because it triggers "decision fatigue" and a fear of the unknown. Travelers are essentially trying to predict every possible scenario—weather changes, formal events, or unexpected spills—within the confines of a limited suitcase. This "what if" mindset leads to overpacking and the anxiety of potentially forgetting essential items like medications or chargers. In 2026, the stress is compounded by stricter airline luggage weight limits and the "unbundling" of fees, where a single kilogram over the limit can result in a hefty charge at the gate. Furthermore, the pressure to look "camera-ready" for social media creates an added layer of perfectionism during the packing process. Psychologists suggest that the "Transition Anxiety" of leaving one's routine contributes to the feeling, making a simple task feel like a high-stakes logistics puzzle. Using a pre-made checklist and packing at least two days in advance are the most effective ways to lower these cortisol levels.