The TSH test is performed in the following situations:
* When there is a suspicion of an underactive thyroid gland (hypothyroidism), presenting with symptoms such as rapid weight gain, hair loss, and intolerance to cold.
* When there is a suspicion of an overactive thyroid gland (hyperthyroidism), characterized by symptoms like sudden weight loss, insomnia, tremors, sweating, and heart palpitations.
* To monitor the effectiveness of treatment for patients receiving thyroid hormone therapy due to hypothyroidism.
* To monitor the treatment process and effectiveness for patients undergoing therapy due to hyperthyroidism.
* As part of routine screening programs in newborns to determine if the thyroid gland is functioning normally.