Arthralgia (from Greek arthro-, joint + -algos, pain) literally means joint pain; it's a symptom of injury, infection, illnesses (in particular arthritis) or an allergic reaction to medication. According to MeSH, the term "arthralgia" should only be used when the condition's non-inflammatory, and the term "arthritis" should be used when the condition's inflammatory. Diagnosis and causes Diagnosis involves interviewing the patient and performing physical exams. When attempting to establish the c… (More on Arthralgia)