Patients with hypothyroidism usually do not suffer from insomnia. Hypothyroidism mainly manifests as reduced metabolic rate and decreased sympathetic excitability, and when the neuropsychiatric system is involved, milder cases can present with impaired memory, attention, comprehension and calculation, as well as drowsiness and unresponsiveness. Severe hypothyroidism can also manifest as dementia, fantasy, and xerostomia, and can present with mucinous edema and coma. Therefore, patients with hypothyroidism are usually prone to drowsiness rather than insomnia. Patients with hyperthyroidism are prone to insomnia, nervousness, anxiety, irritability, irritability, and poor concentration due to inappropriate and continuous synthesis and secretion of excessive thyroid hormones by the thyroid glands, resulting in increased systemic excitability and hypermetabolism.