Cognitive fatigue refers to a state of mental exhaustion that occurs after prolonged periods of thinking, problem-solving, or focusing on tasks. It can result from activities that require intense concentration, such as studying, working on complex projects, or engaging in challenging conversations. Symptoms may include difficulty concentrating, decreased motivation, and a feeling of mental heaviness. This type of fatigue can affect anyone, but it is particularly common among individuals in high-stress environments, such as students or professionals in demanding jobs. To alleviate cognitive fatigue, taking regular breaks, practicing mindfulness, and ensuring adequate sleep can be beneficial.