;

It became both a dramatic and sympathetic scene when "Nene Royal," the first Thai champion of America's Got Talent (AGT), returned to Thailand looking exhausted and worn out, yet faced online criticism from some Thai netizens calling her "arrogant after fame," "out of touch," and asking "why she wasn't smiling."
The drowsiness, cognitive fog, and fatigue after such intercontinental travel are not just ordinary tiredness but a natural bodily response known as Jet Lag or time zone sickness.
Jet Lag is a condition where the body's biological clock is out of sync with the local time of the destination. For example, the time difference between the United States and Thailand can be as much as 11 to 14 hours, causing the hypothalamus—the brain area controlling melatonin hormone secretion—to become confused about when to sleep and when to be awake.
When traveling across continents, the body naturally reacts with the following symptoms:
What to do (Do). | What not to do (Don't). |
| Get natural morning sunlight. This stimulates the brain to stop producing melatonin. | Lie down all day. No matter how sleepy you are, stay awake until the proper bedtime. |
| Drink water regularly. To prevent dehydration caused by travel. | Avoid alcohol or strong coffee before bed. Because they worsen sleep quality. |
| Adjust your wristwatch immediately upon boarding the plane. To psychologically prepare for the new time zone. | Avoid heavy meals late at night. Because they burden the digestive system. |
| Engage in light exercise. Such as walking or stretching to stimulate blood circulation. | Do not start working intensely right after landing. Without allowing time for the body to rest. |
The fatigue from Jet Lag experienced by "Nene Royal" and many travelers is a natural bodily process that requires an average adjustment of 1–1.5 hours per time zone crossed. By understanding the internal clock mechanism, managing diet and sleep, and getting appropriate sunlight exposure, the body can recover quickly and be ready to work effectively.