Why do I feel drowsy and lack energy during the day but can't fall asleep at night?

Generally, the causes of feeling drowsy and fatigued during the day while having difficulty sleeping at night may include irregular作息 routines, anemia, or decreased thyroid function. It is recommended to seek medical attention promptly and, under a doctor's guidance, use medications and improve lifestyle habits for treatment.

1. Irregular作息 routines: Irregular作息 schedules, frequent late nights, and poor-quality sleep can disrupt the body's biological clock, leading to daytime drowsiness and nighttime insomnia. It is advisable to maintain a regular作息 schedule, ensure sufficient and high-quality sleep, and develop healthy sleep habits.

2. Anemia: Anemia typically refers to blood levels below the normal range and is commonly associated with symptoms such as dizziness and fatigue. When anemia reduces blood circulation and lowers basal metabolic capacity, insufficient blood supply to the brain may result in daytime drowsiness and low energy at night. It is recommended to take medications such as cyclosporine soft capsules or ferrous gluconate syrup under medical supervision.

3. Abnormal thyroid hormone secretion: Thyroid hormones play important roles in promoting growth and development and enhancing nervous system excitability. Reduced thyroid hormone secretion during the day may decrease nervous system activity, causing drowsiness; excessive secretion at night may overstimulate the nervous system, leading to insomnia. Under a doctor’s guidance, medications such as propylthiouracil tablets or levothyroxine sodium tablets should be used. Additionally, it is important to engage in appropriate exercise, spend time in outdoor activities, and maintain a positive mood.