Hip pain in young and active individuals presents a diagnostic challenge due to its diverse etiologies and overlapping symptoms. This chapter provides a comprehensive overview of the diagnostic workup, with a focus on history taking, clinical examination, and advanced imaging techniques. It emphasizes the importance of an accurate and standardized diagnostic approach, particularly in distinguishing between femoroacetabular impingement and hip joint instability. Clinical assessment protocols include detailed history taking that addresses pain localization, activity-related aggravators, and symptom chronology, as well as specific clinical tests such as the flexion adduction internal rotation (FADIR), Trendelenburg, and prone instability tests, which are crucial for differential diagnosis. A thorough evaluation of radiographic, magnetic resonance imaging (MRI), computed tomography (CT), and dynamic ultrasound findings is essential to complete the diagnostic process. Radiographic analysis includes parameters such as the lateral center edge angle (LCEA), anterior center edge angle (ACEA), Tönnis angle, and the femoroepiphyseal acetabular roof (FEAR) index to assess femoral coverage and acetabular orientation. MRI and MR arthrography allow for precise evaluation of chondrolabral pathology and early joint degeneration. CT imaging provides three-dimensional assessment of femoral torsion and acetabular version, which is critical for differentiating between impingement and instability. Dynamic ultrasound examinations add functional insights, particularly in detecting microinstability. By integrating clinical and imaging findings, this chapter highlights a structured and evidence-based approach to evaluating hip pain and guiding appropriate management strategies in young individuals.