Pain
Bleeding
External hemorrhoid
Prolapsed internal hemorrhoid
Anal Fissure
Off midline = cancer, HIV, TB, Crohn's
No bleeding
Swelling<unk>  abscess
Perirectal
Ischiorectal
Intersphincteric
Supralevator
Pilonidal cyst
Anal fistula
Hidradenitis suppurativa
No swelling
Proctalgia fugax
No pain
Bleeding
Cancer
Internal hemorrhoid
Swelling
Itch: Condyloma acuminata
No itch: Rectal prolapse
Itching
Discharge: Proctitis
No discharge: Pruritus Ani
Bleeding
External hemorrhoid
Prolapsed internal hemorrhoid
Anal Fissure
Off midline = cancer, HIV, TB, Crohn's
No bleeding
Swelling<unk>  abscess
Perirectal
Ischiorectal
Intersphincteric
Supralevator
Pilonidal cyst
Anal fistula
Hidradenitis suppurativa
No swelling
Proctalgia fugax
External hemorrhoid
Prolapsed internal hemorrhoid
Anal Fissure
Off midline = cancer, HIV, TB, Crohn's
Off midline = cancer, HIV, TB, Crohn's
Swelling<unk>  abscess
Perirectal
Ischiorectal
Intersphincteric
Supralevator
Pilonidal cyst
Anal fistula
Hidradenitis suppurativa
No swelling
Proctalgia fugax<unk>  abscess
Perirectal
Ischiorectal
Intersphincteric
Supralevator
Pilonidal cyst
Anal fistula
Hidradenitis suppurativa
Perirectal
Ischiorectal
Intersphincteric
Supralevator
Proctalgia fugax
Bleeding
Cancer
Internal hemorrhoid
Swelling
Itch: Condyloma acuminata
No itch: Rectal prolapse
Itching
Discharge: Proctitis
No discharge: Pruritus Ani
Cancer
Internal hemorrhoid
Itch: Condyloma acuminata
No itch: Rectal prolapse
Discharge: Proctitis
No discharge: Pruritus Ani
Anorectal disorders
Anal fissure
Dental problems
Anal fistula
Vaginal bleeding 
Anal malignancy
Contact lens problems
Anal tags