You may need a TSH test if you have symptoms of too much or too little thyroid hormone in your blood.
Normal Levels: In adults, normal TSH levels typically range between 0.45 – 4.5 mIU/L, though this varies by laboratory and patient age.
High TSH (Hypothyroidism): Indicates an underactive thyroid, as the pituitary releases more TSH to stimulate the thyroid.
Fatigue, Weight gain, Being very sensitive to cold, Joint and muscle pain, Dry skin, Dry, thinning hair
Heavy or irregular menstrual periods, Fertility problems in women, Depression, Constipation
low TSH (Hyperthyroidism): Indicates an overactive thyroid, as excessive thyroid hormone levels suppress TSH production.
Weight loss, Rapid or irregular heartbeat, Feeling nervous or irritable, Trouble sleeping, Fatigue, Shaky hands, muscle weakness, Sweating or being very sensitive to heat, Frequent bowel movements (pooping a lot) or diarrhea, Goiter (enlarged thyroid that may cause your neck to look swollen)
