What is the reason for low thyroid cancer stimulating hormone TSH

Low thyroid cancer stimulating hormone TSH, that is, low thyroid stimulating hormone (TSH) levels, may be caused by primary hyperthyroidism, pituitary lesions, drug factors, etc. It is recommended that patients seek medical treatment in time and receive targeted treatment under the guidance of a doctor.

1. Primary hyperthyroidism: It is mostly caused by factors such as excessive iodine intake or autoimmune abnormalities, which can lead to excessive proliferation of thyroid follicular epithelial cells, thereby secreting more thyroid hormones. At this time, the body is in a high metabolic state, and symptoms such as palpitations, sweating, and weight loss will occur. This situation will cause a decrease in TSH, and generally requires treatment with drugs such as methimazole tablets as prescribed by a doctor;

2. Pituitary lesions: such as pituitary tumors. When the tumor compresses the hypothalamus, it will affect the function of the hypothalamic-pituitary axis and thus affect the secretion of TSH. At this time, the patient may experience symptoms such as headache and decreased vision. It is recommended to undergo surgical resection under the guidance of a doctor;

3. Drug factors: If you take drugs such as levothyroxine sodium tablets, it may cause the level of thyroid hormone in the body to increase, thereby inhibiting the secretion of TSH. At this time, the patient may experience symptoms such as palpitations and hand tremors. It is recommended to adjust the dosage or stop taking the drug under the guidance of a doctor.

In addition to the common causes mentioned above, it may also be related to subacute thyroiditis. If the patient's symptoms persist or worsen, he or she should go to the endocrinology department of the hospital in time and complete relevant examinations to confirm the diagnosis.