Mental fatigue is a state of tiredness that affects cognitive functions, making it harder to think, concentrate, and make decisions. It can result from prolonged periods of mental activity, stress, or lack of sleep. Symptoms may include difficulty focusing, irritability, and a general sense of exhaustion, even if the body is not physically tired. This condition can impact daily life, reducing productivity and overall well-being. To combat mental fatigue, it is essential to take regular breaks, engage in physical activity, and ensure adequate rest. Practicing mindfulness or relaxation techniques can also help restore mental energy and improve focus.