Chronic Pain often Unclear Etiology Intractable Chronic Pain Without Obvious Pathology Evidence-Based Management of Sickle Cell Disease: Expert Panel Report (EPR), 2014 This type of chronic sickle cell pain may be an extension of recurrent acute painful episodes. Therefore, early and aggressive intervention in treating acute sickle cell pain may reduce the development of chronic pain. None Request inclusion into relevant ontology The only complaint is the patient's self-report of pain that does not go away. http://doi.org/10.1182/blood-2012-04-383430 Evidence-Based Management of Sickle Cell Disease: Expert Panel Report (EPR), 2014 Chronic Sickle Cell Pain