The process of forming or developing an abscess; becoming filled with pus.
From 'abscess' used as a verb (a relatively new usage) plus '-ing' for the present participle, showing how nouns can shift to verbs in medical contexts.
When doctors say an infected wound is 'abscessing,' they mean the immune system is walling off the infection with white blood cells—it's your body trying to fight back by creating a protective barrier of pus.
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