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.
Doctors are taught that if active thyroid (T3) levels drop, the TSH will increase. Thus, endocrinologists and other doctors tell patients that an elevated TSH is the most useful marker for diminished T3 levels and that a normal TSH indicates that their thyroid status is âfineâ. The TSH is, however, merely a marker of pituitary levels of T3 and not of T3 levels in any other part of the body.