harbour noun [C or U]. B1 an âarea of âwater next to the âcoast, often âprotected from the âsea by a âthick âwall, where âships and âboats can âshelter: Our âhotel âroom âoverlooked a âpretty little âfishing harbour. Compare dock noun. Compare. dock noun. More examples. 1  He has a â house down by the harbour.
Quick Answer. Symptoms of low thyroid-stimulating hormone, or TSH, levels due to hyperthyroidism include rapid heartbeat, sudden weight loss, nervousness, tremors and increased appetite, notes Mayo Clinic. Some symptoms of low TSH levels due to secondary hypothyroidism are fatigue, depression, weight gain and cold intolerance, states UCLA Endocrine Surgery.
â¢ With normal thyroid and anterior pituitary/hypothalamus function, a decreased T-3 and T-4 causes an increase in TSH, and an increase in T-3 and T-4 causes a decrease in TSH. â¢ TSH is an integral part of a thyroid panel useful for the determination and potential differentiation of hypothyroidism. â¢ TSH is used to diagnose primary hypothyroidism when there is a problem intrinsic to the thyroid gland itself. TSH levels will be elevated.