festering

(medicine) the formation of morbific matter in an abscess or a vesicle and the discharge of pus

पीप बहने, संक्रमण अथवा अवरोध obstruction हो तो तुरंत डाक्टर की सलाह लेनी चाहिए।

He strongly condemned the destructive forces of terrorism that continue to be a festering challenge, distracting our attention from development.