Occur proximal to dentate line
Constant in their location: 2-, 5-, and 9-o'clock positions (when patient viewed prone)
Not readily palpable; best visualized through anoscope
May be palpable when prolapsed or thrombosed
Painless bleeding
Only painful when nonreducible, strangulation of prolapsed<unk> , or thrombosis (these can lead to infection/necrosis)
May be palpable when prolapsed or thrombosed
Only painful when nonreducible, strangulation of prolapsed<unk> , or thrombosis (these can lead to infection/necrosis)
Internal hemorrhoid
Anal fissure
External hemorrhoid
Anal fistula
Anal malignancy
Rectal prolapse
Anal tags
Anorectal abscess