TSH regulates and helps your thyroid glands release T3 and T4 hormones. Without TSH, your system would fail.
While TSH is produced by the pituitary gland located at the base of the skull, T3 and T4 hormones are produced by the thyroid gland located at the lower front of the neck.
Higher levels of TSH suggest hypothyroidism, while lower levels of TSH indicate hyperthyroidism. The normal range for TSH is between 0.27 - 4.5 mlU/L.
You may want to consult with your doctor if your TSH levels are not within the normal range as this may need supplementation, and also further testing is required to understand the cause of abnormal levels.