<unk>  (from Greek arthro-, joint + -algos, pain) literally means joint pain;   it is a symptom of injury, infection, illnesses in particular arthritis or an allergic reaction to medication.
According to MeSH, the term<unk>  should only be used when the condition is non-inflammatory, and the term arthritis should be used when the condition is inflammatory.
Arthralgia
Myalgia
Arthritis
Mastalgia
Bone pain
Pruritis
Erythema
Leukocytosis