例1：患者男，60岁，因肛旁肿痛7天，剧痛伴发烧3夭，来院就诊。膝胸位体检：发现11点至4点位肛旁有一7X4cm大小红肿区，明显压病，有波动感，测体温37．8℃，诊断为肛周脓肿。遂于当日在骰麻下行肛周脓肿切开引流术，放出脓液约20ml，用手指探查脓腔时，发现一2．1cm长鱼刺。 Example 1: Male patient, 60 years old, due to anal side swelling and pain for 7 days, severe pain with fever 3 Yao, to the hospital. Knee chest examination: Found 11 o’clock to 4 o’clock there is a 7X4cm size around the anal swelling area, significantly pressure disease, a sense of volatility, measured body temperature 37.8 ℃, the diagnosis of perianal abscess. Then on the same day in the durian incision perianal abscess incision and drainage, release pus about 20ml, exploration of the abscess with your fingers, found a 2.1cm long fishbone.