7. Depression or Anxiety
Mood disturbances are common in those suffering from thyroid dysfunction. With the incidence of hypothyroidism, serotonin levels in the brain tend to lower, thus leading to lethargy, low spirits and depression. Hypothyroidism, on the other hand, leads to the body working overtime, thus leaving a person prone to anxiety, restlessness and excess energy even. Thus, extremities of mood are another sign to watch out for.