What should you know about jet lag symptoms?

You might wake before dawn, struggle to fall asleep at local bedtime, or feel an urge to sleep during the day. Difficulty concentrating, irritability, low energy, a mild headache and appetite changes can accompany the sleep disturbance. The symptoms begin after crossing time zones because the body clock has not yet matched the new cycle of light, meals and activity.

A symptom by itself does not establish the cause. Fever, persistent vomiting, severe pain, or symptoms that began before travel may point to another illness and should not be dismissed as jet lag.

Set your watch and daily routine to local time, then use daylight, meals and activity to reinforce that schedule. Keep the room dark and quiet at bedtime, limit bright screens late in the evening, and drink water after the flight. A short early nap can be useful, while a long late nap may make nighttime sleep more difficult.

Avoid driving or other hazardous tasks if daytime sleepiness slows your reactions. If you are considering melatonin, a sedating medicine or a supplement, ask a clinician or pharmacist first because timing, interactions and health conditions matter.

Seek urgent care for chest pain, severe shortness of breath, fainting, sudden weakness, new confusion, or a sudden severe headache. Arrange an appointment if symptoms are getting worse, prevent safe daily activities, or continue after your sleep routine has had time to settle. Travel-related illness, medication effects and sleep disorders can resemble jet lag.

Which symptoms fit jet lag in my situation? Could my medicines, snoring or another illness be affecting sleep? How should I plan daylight and naps for my return journey? When should I be assessed if sleep remains disrupted?