Which disorder often exhibits physical symptoms that include fatigue and irritability?

Somatoform disorders are characterized by the presence of physical symptoms that cannot be fully explained by any medical condition. Individuals with these disorders frequently experience symptoms such as fatigue and irritability, which stem from psychological issues rather than any identifiable physical cause. This can lead to distress and impairment in functioning as individuals often seek medical attention for their symptoms, despite a lack of an organic diagnosis.

In contrast, anxiety disorders may also involve fatigue and irritability, but they are primarily defined by excessive worry, fear, or apprehension that can lead to physical symptoms as a secondary response to anxiety. Bipolar disorder is marked by significant mood swings, encompassing depressive and manic episodes, which may lead to changes in energy levels but isn't primarily defined by physical symptoms. Personality disorders involve enduring patterns of behavior, cognition, and inner experience that deviate from cultural expectations, but they do not primarily manifest in physical symptoms. Thus, somatoform disorders are the most accurate choice when considering the context of physical symptoms like fatigue and irritability.