In this article from Michigan Medicine, Sandra Hearn, M.D., a clinical associate professor of physical medicine and rehabilitation at the University of Michigan Health, explores phrenic neuropathy, a condition where damage to the phrenic nerves impairs breathing, ranging from mild to life-threatening cases. Hearn discusses the causes, symptoms, and treatment options, including surgery and physical therapy, while addressing the challenges in diagnosing and managing the condition. The article underscores the need for further research to enhance understanding and diagnosis and introduces emerging diagnostic tools, such as neuromuscular ultrasound, that could improve treatment outcomes.