The mood disorder that commonly causes irritability is Major Depressive Disorder (MDD). While sadness is the hallmark symptom of depression, irritability is also prevalent and often overlooked. In some cases, irritability can even be the predominant or most prominent symptom of depression.
People with MDD may experience persistent feelings of irritability, agitation, and frustration, along with other symptoms such as sadness, loss of interest in activities, changes in appetite or weight, sleep disturbances, fatigue, difficulty concentrating, and feelings of worthlessness or guilt.
It's essential to note that irritability is not exclusive to Major Depressive Disorder and can be present in other mood disorders like Bipolar Disorder, Disruptive Mood Dysregulation Disorder (in children and adolescents), and some anxiety disorders as well. If you or someone you know is experiencing persistent irritability or other mood-related symptoms, it's crucial to seek professional help from a mental health provider for an accurate diagnosis and appropriate treatment.