This document summarizes the components of a mental state examination (MSE), which is a structured way to observe and describe a patient's current mental condition. The MSE aims to gather a comprehensive description of the patient's mental state to aid in accurate diagnosis and treatment planning. It evaluates appearance and behavior, speech, mood and affect, thoughts, perceptions, cognitive functions, insight, and judgment. Specific abnormalities are described for each component to note signs of various mental health conditions.