Rectum.

Mur-ac - Excessive soreness; prolapse while urinating; haemorrhoids,
blue, hot, and so sore cannot bear pressure of the sheet.
Nit-ac - Sticking pain in rectum at stool; soreness after stool.
Aesculus - Itching, dryness, fulness; haemorrhoids.
Aloe - Burning in rectum and anus.
Alum - Inactive; stools accumulate in rectum from lack of desire to
empty it; soreness and bleeding from rectum.
Ars - Burning in rectum.
Calc - Aching, burning, jerking in rectum.
Hydras - Long-lasting pain in rectum with constipation and gastric

derangements; haemorrhoids.
Ign - Haemorrhoids with stitching pain from anus into rectum.
Kali-carb - Large haemorrhoids, with sticking pain in them from
coughing.
Lilium - Constant pressure in rectum.
Merc-cor - Burning in rectum and anus after stool, intense tenesmus.
Nux-vom - Constant uneasiness in rectum.
Sep - Pain in rectum with stool; pain lasts a long time.
Sul - Aching, itching pain in rectum, with constipation.