肛旁脓肿的感染起源部位绝大多数是在齿线某一隐窝处,以后感染扩散,形成肛旁脓肿。脓肿自行溃破或经切开引流后,脓腔逐渐缩小,但由于对感染的隐窝未作处理,因此不能完全愈合(或暂时愈合,以后又将溃破),即形成肛瘻,该感染隐窝即是肛瘻的内口。 Most of the origin of the infection in the perianal abscess is at a crypt of the tooth line, and the infection spreads later to form the perianal abscess. Abscess ulceration or after incision and drainage, the abscess gradually reduced, but because of infection of the crypt untreated, it can not be completely healed (or temporarily healed, and then ulcerated), the formation of anal fistula, the infection Wo is the inner mouth of the anal fistula.