Hyperthyroidism (Overactive Thyroid)
Too much of thyroid hormones by the thyroid is recognised by the pituitary gland, resulting in a reduction in TSH levels respectively.
Hypothyroidism (Underactive Thyroid)
Too little of thyroid hormones by the thyroid is recognised by the pituitary gland, resulting in a increase in TSH levels respectively.
The term thyroid nodule refers to an abnormal overgrowth of cells in the thyroid gland, which causes a lump in the thyroid.
The term “thyroiditis” refers to inflammation of the thyroid gland. The thyroid is a butterfly-shaped gland that is located centrally in the neck, just above the collarbones and below w the larynx (voicebox).