What're the symptoms of jet lag?
Symptoms of jet lag can be mild or severe, depending on the number of time zones you cross and your sensitivity to such changes. Fatigue will occur in a person who travels across multiple time zones. It usually takes 1 day to recover from each time zone that is crossed. The person will be worn out and tired for days after arriving at his or her destination. Fatigue is usually accompanied by a lack of concentration and motivation. It's hard to deal with an activity that requires effort or skill, such as driving, reading, or discussing business. Poor concentration, insomnia, daytime sleepiness, slowed reflexes, indigestion, hunger at odd hours, irritability, depression, lack of resistance to infections, headaches and muscle aches, mood disturbance, and loss of mental efficiency are other symptoms of jet lag.