Why does a 45-year-old woman experience insomnia throughout the entire night?

　　A 45-year-old woman's insomnia throughout the night may be caused by menopausal changes, psychological stress, endocrine disorders, depression, hyperthyroidism, etc. Treatment usually includes adjusting lifestyle habits, psychological counseling, medication, or hormone replacement therapy, specifically determined according to the underlying cause. If abnormalities occur, timely medical attention is recommended. Detailed analysis is as follows:

　　1. Menopausal changes: After entering menopause, women experience gradual decline in ovarian function and decreased estrogen levels, which may lead to dysfunction of the nervous system, thereby affecting sleep and causing insomnia throughout the night. It is recommended to improve sleep through adjusting sleep schedules, maintaining regular eating habits, and engaging in moderate exercise.

　　2. Psychological stress: Long-term psychological stress, anxiety, or tension may cause the nervous system to remain in an excited state continuously, thus affecting sleep and leading to insomnia throughout the night. It is recommended to relieve psychological stress and improve sleep quality through psychological counseling, relaxation training, and adjusting mindset.

　　3. Endocrine disorders: Disorders of the endocrine system may lead to abnormal hormone secretion, such as reduced melatonin secretion, thereby affecting the sleep cycle and causing insomnia throughout the night. Symptoms may include mood swings, weight changes, menstrual disorders, etc. It is recommended to adjust lifestyle habits and, if necessary, take medications such as propylthiouracil tablets, methimazole tablets, or propranolol hydrochloride tablets as directed by a physician.

　　4. Depression: Depression may be triggered by stress, social experiences, etc., and patients may experience symptoms such as low mood and loss of interest. These negative emotions may affect sleep, leading to insomnia throughout the night. Doctors generally recommend seeking professional mental health support and taking medications such as bupropion hydrochloride tablets, mirtazapine tablets, or fluoxetine hydrochloride tablets as directed by a physician to alleviate depressive symptoms.

　　5. Hyperthyroidism: Excessive secretion of thyroid hormones causes an increased metabolic rate and heightened nervous system excitability, thereby affecting sleep and leading to insomnia throughout the night. Symptoms may include palpitations, excessive sweating, weight loss, etc. It is recommended to control the condition with medications such as methimazole tablets, propylthiouracil tablets, or carbimazole tablets under a doctor's guidance.

　　It is recommended to maintain healthy sleeping habits, ensure sufficient sleep, improve diet, adjust physical condition, and maintain overall health in daily life.