Pain in the tear sac (the small pouch that collects tears).
From Greek 'dakryon' (tear) + 'kystis' (sac or bladder) + '-algia' (pain). This term specifically targets pain in the lacrimal sac, which is a small structure in the inner corner of the eye.
The tear sac is so small most people don't know it exists, but when it gets painful from blocked ducts or infection, doctors have this exact word to describe the problem!
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