A Visual Analog Scale (VAS) is a simple, yet effective tool used in Nursing and medical settings to assess the intensity of a patient's pain, symptoms, or overall wellbeing. It is a psychometric response scale typically used in questionnaires. The VAS consists of a straight line, usually 10 centimeters long, with endpoints defining the extremes of the symptom being measured, such as "no pain" and "worst pain imaginable."
