The symptoms of jet lag include fatigue; disorientation; insomnia; nausea; irrational behavior and mental confusion to edema; headache; and anorexia. These symptoms may last from 1-10 days depending on the person. As a result, many vacations, political and business dealings have been dealt serious blows because of the symptoms of jet lag.
Tacuina sanitatis (XIV century) 1-aspetti di vita quotidiana, sonno, Taccuino Sanitatis, Cas. Image sourced from Wikimedia Commons. Available here.