Common Symptoms of Hypothyroidism

• In patients who have low levels of TSH, which is considered hypothyroidism, a broad range of symptoms may be present. Among them are fatigue, constipation, hoarseness, pale skin, brittle fingernails, leg cramps or stiffness, sluggishness, depression, heavy menstrual periods, weight gain and sensitivity to cold.
  
  

Infants With Hypothyroidism

• Children as young as newborns may exhibit signs of a low TSH level. Among them: yellow skin and eyes, or jaundice; tendency to choke easily; a puffy face; and an enlarged tongue.
  
  

Hyperthyroidism

• When the body produces too much TSH, leading to an overactive thyroid, the condition is known as hyperthyroidism. Symptoms of hyperthyroidism are similar to those for hypothyroidism, like muscle fatigue, but there are some differences. Patients may experience an unexplained weight loss, a rapid heart rate, nervousness and changes in menstrual periods.
  
  

Graves' Disease

• Hyperthyroidism can sometimes lead to Graves' disease, a condition in which the eyeballs are pushed forward, causing a bulging appearance. The eyes may also become red and swollen, and the eyes may also become overly sensitive to light.
  
  

Warnings

• In patients with hypothyroidism, an over-stimulation of the thyroid to produce TSH can cause the development of a goiter, or enlarged thyroid. Other symptoms may include forgetfulness, depression or mental impairment.