The differential diagnosis of<unk>  is extensive, but the general etiological themes are infection and inflammation. Some lesions can cause a discharge by mechanically interfering with, or preventing the complete closure of, the anal canal. This type of lesion may not cause discharge intrinsically, but instead, allow transit of liquid stool components and mucus. *Common causes include: haemorrhoids, proctitis, anal fissure,<unk>  prolapse, perianal warts (anal condyloma acuminatum), *Less common causes include: colorectal carcinoma, irritable bowel syndrome, solitary<unk>  ulcer syndrome, anal fistulae, villous adenoma, poor anal hygiene *Rare causes include: sexually transmitted diseases (e.g. syphilis,<unk>  gonorrhea, chlamydia), anal carcinoma, AIDS,<unk>  foreign body, bowel obstruction, rectocele, enterocele, ulcerative colitis, bacterial colitis (e.g. syphilitic colitis), anal/perianal tuberculosis, perianal abscess (when ruptured). Perianal Crohn's disease is associated with fistulizing, fissuring and perianal abscess formation. After colostomy, the distal section of bowel continues to produce mucus despite fecal diversion, often resulting in mucinous discharge. Occasionally, intestinal parasitic infection can present with discharge, for example whipworm.
Rectal discharge
Nipple discharge
Anal plug
Punctal plug
Vaginal discharge
Anal wink
Perianal hematoma
High-altitude flatus expulsion