What does arthralgia mean?
Arthralgia is the medical term for pain occurring in one or more joints. Unlike arthritis, which specifically denotes inflammation of the joint tissues, arthralgia describes the symptom of joint pain itself, whether or not inflammation is present. It can arise from many causes, including viral infections, physical overuse, autoimmune conditions, or as a side effect of certain medications, and it may affect a single joint or many joints at once (in which case it is described as polyarticular). Because it names a symptom rather than a diagnosis, doctors frequently record arthralgia while investigating its underlying cause. The word belongs to formal medical register — clinicians write 'arthralgia' in notes and literature, while everyday conversation favors the plainer phrase 'joint pain'. Its Greek roots, combining words for 'joint' and 'pain', make it a useful anchor for understanding related medical terms such as myalgia and neuralgia, which follow the same pattern of pairing a body part with pain.
nounPain in a joint or joints, especially as a symptom of an underlying condition rather than a disease in its own right.
- Pain in one or more joints, considered as a clinical symptom.
"The patient reported persistent arthralgia in both knees following the viral infection."
"After weeks of fever and fatigue, she developed arthralgia in her wrists and ankles that made typing unbearable."
"The drug's listed side effects include headache, nausea, and mild arthralgia."
Usually treated as uncountable when referring to the symptom in general; the plural appears mainly in clinical contexts describing multiple distinct occurrences or presentations.
"Recurrent arthralgias were noted across multiple follow-up visits."
Doctors use 'arthralgia' when your joints hurt but nothing shows up on the X-ray — the pain is real, even when the inflammation isn't.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of arthralgia
Arthralgia derives from Greek: 'arthron' meaning 'joint' and 'algos' meaning 'pain'. The combining form '-algia' entered modern medical vocabulary through New Latin and became productive across medicine, giving rise to parallel terms such as myalgia (muscle pain) and neuralgia (nerve pain). The same Greek root 'arthron' also underlies 'arthritis' and 'arthropod', reflecting how widely this root spread through scientific terminology.
Related word forms
How arthralgia is actually used
A formal, medical register term used chiefly by clinicians and in medical literature; lay speakers almost always say 'joint pain'. In medical documentation, arthralgia signals pain without confirmed inflammation, which is why it is often distinguished from arthritis in differential diagnosis.
Easily confused with arthralgia
Arthritis involves inflammation of the joint itself, whereas arthralgia refers to joint pain without necessarily any inflammation.