How bad is hypothyroidism?

Hypothyroidism means that the thyroid gland is not working at its optimal levels. The condition's severity can vary. The most severe form of hypothyroidism, Myxedema coma, is rare.
In general, people suffering from hypothyroidism will experience unexplained weight gain, extreme fatigue, depression, an overall sense of weakness, sensitivity to the cold, and heavier menstrual periods in females.

Most people with hypothyroidism are able to control the condition by taking medication that provides them with the missing thyroid hormone. This treatment will cause the thyroid levels to return to normal, but the replacement hormone must be taken for the rest of the individual's life.