High thyroid stimulating hormone (TSH) may be caused by a decrease in thyroid hormone secretion, which is commonly seen in hypothyroidism, hypopituitarism and other diseases. It is recommended to go to an endocrinologist for further examination to determine the cause of thyroid hormone deficiency and to provide targeted treatment. Thyrotropin is a hormone secreted by the pituitary gland and regulated by the hypothalamus and thyroid gland. Its main function is to control and regulate the activities of the thyroid gland. 1. Hypothyroidism: common in autoimmune system injury, sub-total thyroidectomy, after iodine 131 treatment. It is characterized by chills, fatigue, memory loss, etc. Oral levothyroxine sodium is commonly used to replace thyroid hormone treatment. 2. Hypopituitarism: caused by hypothalamus or pituitary lesions, such as pituitary tumor, hypothalamic injury. Surgical removal of the lesion is commonly used in clinical practice. If you find high thyroid stimulating hormone, it is recommended to consult a doctor as soon as possible, find out the cause of the disease with the help of a doctor, and standardize the treatment of the disease.