Mental fatigue can be caused by unfinished tasks and unaddressed issues. The concept of "open loops" refers to the mental hum of pending tasks, such as ignored texts or avoided conversations. This constant mental distraction can be draining, similar to a laptop slowing down with too many open browser tabs.

Some individuals have shared their experiences with open loops on social media and podcasts, using the phrase to recognize and combat the habit. One example is a person who noticed a pattern of neglecting tasks, such as fixing a hole in a jacket pocket.

Further details about the impact of open loops on mental fatigue are available from the source.