Colitis means an inflammation of the large intestine.

Treatment
Various treatments can be mentioned but it should be assured that the concerned person is having the mentioned symptoms.

Arsenic 30: The Pain in the abdomen, especially at midnight from 12-2 a.m. is the main symptom for which the medicine named Arsenic should be taken. The stools are dark, offensive and loose, with a cadaveric odour, burning in the anus and great prostration during and after stools. There is extreme mental restlessness and fear, the victim can feel that he is about to die.

Lachesis 30: Ulcerative colitis with offensive, bloody stools. Excessive sensitiveness to touch, an intolerance of tight clothing and a jealous or suspicious nature are other pointers to this remedy.

Merc cor 30: The following are the symptoms that confirm the use of the Merc cor. Ulcerative colitis with copious, offensive bloody and slimy stools. There is severe, colicky pain in the abdomen before, during and after the stools. Other distinguishing features can be included as intense thirst and a moist, swollen tongue.

Phos 30: Colitis with burning in the abdomen and the anus, and stools containing bright red blood are the important symptom for taking the Phos. An oversensitive nature and a craving for cold foods or drinks are other pointers to this medicine.