What is the medical term for condition of low level of hormone secreted by a gland in the neck?

The medical term for a low level of the hormone secreted by the thyroid gland in the neck is "hypothyroidism." This condition occurs when the thyroid gland does not produce enough thyroid hormones, leading to various metabolic issues and symptoms such as fatigue, weight gain, and sensitivity to cold. It can be diagnosed through blood tests measuring levels of thyroid-stimulating hormone (TSH) and thyroid hormones (T3 and T4).