Why do I need a TSH test?You may need a TSH test if you have symptoms of too much thyroid hormone in your blood (hyperthyroidism), or too little thyroid hormone (hypothyroidism).Symptoms of hyperthyroidism, also known as overactive thyroid, include:AnxietyWeight lossTremors in the handsIncreased heart ratePuffinessBulging of the eyesDifficulty sleepingSymptoms of hypothyroidism, also known as underactive thyroid, include:Weight gainTirednessHair lossLow tolerance for cold temperaturesIrregular menstrual periodsConstipation
