Hello....The normal value ranges between 0.4 to 4.5 milliunits per liter. Generally high values are seen in infection of thyroid gland or hypothyroidism and low values in hyperthyroidism, toxic nodule. A person suffering from hyperthyroidism will have sleeplessness, hearing ones own heart beating faster, generalised weakness, intolerance to heat, bowel disturbance, weight loss etc... If you have this symptoms, clinical examination with certain investigations can help in proper ascertaining of the cause...... In hypothyroidism- patient will have symptoms of weight gain, loss of interest of having food, sleepy/ drowsy, intolerance to the cold, menstrual irregularities, easy tiredness.... Kindly consult a nearest physician for further queries...