The Patient Health Questionnaire (PHQ) is a widely used tool designed to help healthcare providers assess and diagnose mental health conditions, particularly depression and anxiety. It consists of a series of questions that patients answer about their feelings and behaviors over the past two weeks. The results can guide treatment decisions and monitor changes in a patient's mental health over time. The PHQ is often used in various healthcare settings, including primary care and mental health clinics. It is a self-administered questionnaire, making it easy for patients to complete. The information gathered helps clinicians understand the severity of symptoms and develop appropriate care plans.