John P. Cunha, DO, FACOEP
John P. Cunha, DO, is a U.S. board-certified Emergency Medicine Physician. Dr. Cunha's educational background includes a BS in Biology from Rutgers, the State University of New Jersey, and a DO from the Kansas City University of Medicine and Biosciences in Kansas City, MO. He completed residency training in Emergency Medicine at Newark Beth Israel Medical Center in Newark, New Jersey.
Melissa Conrad Stöppler, MD
Melissa Conrad Stöppler, MD, is a U.S. board-certified Anatomic Pathologist with subspecialty training in the fields of Experimental and Molecular Pathology. Dr. Stöppler's educational background includes a BA with Highest Distinction from the University of Virginia and an MD from the University of North Carolina. She completed residency training in Anatomic Pathology at Georgetown University followed by subspecialty fellowship training in molecular diagnostics and experimental pathology.
- What is jet lag?
- What are other symptoms and signs of jet lag?
- How long does jet lag last?
- What is a time zone?
- What causes jet lag?
- How does the body keep time?
- Does the direction of travel matter?
- Do the symptoms of jet lag vary in intensity?
- What are risk factors for jet lag?
- Are there any remedies for jet lag? Is it possible to prevent jet lag?
- What is the treatment for jet lag?
- Are there effective medications for jet lag? What is the role of melatonin in jet lag?
What is jet lag?
Jet lag, also called desynchronosis and flight fatigue, is a temporary disorder that causes fatigue, insomnia, and other symptoms as a result of air travel across time zones. It is considered a circadian rhythm sleep disorder, which is a disruption of the internal body clock.
What are other symptoms and signs of jet lag?
Besides fatigue and insomnia, a jet lag sufferer may experience a number of physical and emotional symptoms, including anxiety, constipation, diarrhea, confusion, dehydration, headache, irritability, nausea, indigestion, difficulty concentrating, sweating, coordination problems, dizziness, daytime sleepiness, malaise (a general feeling of being unwell), and even memory loss. Some individuals report additional symptoms, such as heartbeat irregularities and increased susceptibility to illness.
Children and babies can also suffer the same jet lag symptoms as adults.
Generally, people do not need a medical evaluation for a diagnosis of jet lag. If you have traveled across several time zones and feel the symptoms associated with jet lag, you likely have it. If your symptoms of jet lag are severe, do not go away after a few days, or you have any other concerns, see a doctor.
How long does jet lag last?
Recovering from jet lag depends on the number of time zones crossed while traveling. In general, the body will adjust to the new time zone at the rate of one or two time zones per day. For example, if you crossed six time zones, the body will typically adjust to this time change in three to five days.
Jet lag is temporary, so the prognosis is excellent and most people will recover within a few days.
Complications of jet lag are extremely rare. If a person has a preexisting heart condition, the stress of the disruption in the circadian rhythm, combined with the stress of travel, the high altitude, and immobility during flight may result in a heart attack. If the jet lag results in chronic sleep deprivation, stroke may occur in certain predisposed individuals.
Next: What is a time zone?
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