10 Causes of Insomnia
Cause #2: Travelling To Different Time Zones
Travelling to a different time zone can cause insomnia. This usually happens when you travel eastwards. As the new time zone is ahead of your normal time zone, you would need to sleep much earlier than you are accustomed to. However, because your biological clock is set for sleeping later, you may find it difficult to fall asleep.
This kind of insomnia is usually temporary and you will probably adjust in a few days. While travelling westward can also cause some sleep disturbance, it is usually less serious because it is similar to having a longer day or night so you will still have adequate time to rest.
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