Fatigue is a common symptom characterized by persistent tiredness, weakness, or lack of energy that interferes with daily activities and overall well-being. It can be caused by a variety of factors, both physical and mental. Physical causes of fatigue may include lack of sleep or poor sleep quality, overexertion, dehydration, nutritional deficiencies, chronic illnesses such as anemia or thyroid disorders, or side effects of medications. Mental health conditions such as depression, anxiety, or stress can also contribute to feelings of fatigue by affecting mood, motivation, and cognitive function. Additionally, lifestyle factors like poor diet, sedentary behavior, or excessive caffeine or alcohol consumption can exacerbate fatigue. While occasional fatigue is normal and can often be remedied with rest, hydration, and stress management techniques, persistent or severe fatigue that interferes with daily functioning may indicate an underlying health issue and should be evaluated by a healthcare professional. Treatment for fatigue typically involves addressing the underlying cause, whether it be lifestyle modifications, psychological interventions, or medical therapies, to improve energy levels and overall quality of life.