The suffix -algia denotes pain in a particular region or structure. Neuralgia is nerve pain, myalgia muscle pain, arthralgia joint pain and cephalalgia headache.
Greek álgos = pain
pain suffix, -odynia
-algia
The suffix -odynia is used with the same meaning, for example in pleurodynia. Both endings describe a symptom, not a diagnosis.
That is an important distinction in clinical thinking: a symptom word names the complaint, a diagnostic word names its cause.
Δωρεάν και χωρίς καμία δέσμευση.