Reviewed by medical experts • For informational purposes only
Causes of jet lag: body clock mismatch after crossing time zones, why eastbound is harder, and what makes it worse.
Jet lag happens when your internal body clock does not match the local time after you cross several time zones.
The main cause
The body clock (circadian rhythm) is set by light and dark and controls sleep, hunger, body temperature and hormones such as melatonin. After fast travel across time zones, the clock stays on home time for days and the new day-night pattern does not fit it.
What makes it worse
Related factors
Not a disease
Jet lag is a temporary body clock mismatch and not an infection or a lasting illness.
Ayurvedic view
Ayurveda would describe it as Vata disturbance from travel, irregular routines and disturbed sleep. This is a traditional view and not a modern explanation.
Key point
Jet lag comes from a clock mismatch. Light timing, sleep habits and the direction of travel decide how severe it is.
Before your appointment
Note where and when you travelled, how many time zones you crossed, and how long your sleep problems have lasted. List all medicines, melatonin, herbs and supplements you take, and your caffeine and alcohol use. Mention snoring, low mood, anxiety, leg pain or swelling, and any existing conditions such as diabetes or epilepsy. If you are pregnant or travelling with a child, say so. Ask about safe sleep aids and the warning signs that need urgent care. Call 112 for chest pain or severe breathlessness.
Written By
Dr. Daksh
BDS
Reviewed By
Dr. Varun Gupta
MD Pharmacology, MBBS
Last updated on
27 Sep 2022 • 06:23 PM (IST)
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