Abstract
In psychosomatic medicine of thyroid diseases, it is important for clinicians to consider "Is hormone a cause? or stress a cause?" and examine each patient. It is known that both Graves' disease and Hashimoto's thyroiditis often complicate mental disorders. Nowadays depressive state and neurosis are common as psychiatric images in both diseases and are affected by not only thyroid functions but also various psychosocial factors. Recently, many researches confirmed that life events and daily hassles affect the onset of Graves' disease. On the other hand, in researches on psychosocial factors in the clinical course of Graves' disease, life events, daily hassles, depression, anxiety, alexithymia, AC scale of the egogram, and eating disorder were found as the worsening factors. Conversely, A and FC scales of the egogram were found as the improving factors.