What could happen if Graves’ disease is not treated?

Without treatment, Graves’ disease can lead to heart problems, weak and brittle bones, and even death. “Thyroid storm” is a very rare, life-threatening condition that can occur if overactive thyroid is not treated. An acute stress, such as trauma, surgery, or infection, usually triggers it to occur. In pregnant women, untreated disease can threaten the mother and unborn baby’s health.