Recognizing and addressing the controversies surrounding using patient-reported outcome measures (PROMs) is crucial for enhancing evaluation standards in clinical studies in orthopedics, sports medicine, and rehabilitation. The article comprehensively described the challenges of using PROMs to evaluate knee conditions in these fields. Apart from defining and characterizing patient-reported outcomes and their measures, the article discussed controversies around them, such as using them as primary outcomes. It highlighted the importance of standardizing and validating PROMs. Several initiatives taken to improve the selection of appropriate outcomes for clinical research purposes were described. Additionally, the potential of technology, mainly digital health tools and mobile applications, was mentioned in the context of enhancing the collection and analysis of PROMs. The article also raised the issue of the readability of PROMs, defined as the ease with which they can be read and understood by patients. The article concluded that adopting a complementary approach to treatment evaluation by integrating subjective and objective measures is imperative for accurately assessing efficacy. This comprehensive approach provides a more holistic understanding of patient outcomes, forms the foundation for evidence-based medicine, and informs future healthcare policies. Proactive measures are urgently needed to address concerns and improve the reliability and validity of PROMs for clinical practice and research. LEVEL OF EVIDENCE: level V.