Abstract Contraction of the anal canal may be classified according to pathologic conditions as of three general types. Types 1 and 2, which usually follow some operative procedure, are the subject of this paper. Diagnosis depends upon history of previous operation, continued pain, increasing constipation and a sensation that the anal opening is too small. Complete relaxation under adequate anesthesia may be necessary before the exact type of contraction is ascertained. Pectenosis and coccygodynia, which are not so well known, are discussed in somewhat greater detail than other conditions to be differentiated from postoperative anal contraction.