Irritable bowel syndrome, Crohn's disease, bowel obstructions and ulcerative colitis are causes of mucus in the stool, according to About.com. Mucus in the feces is only healthy if there are trace amounts.
About.com notes that IBS can cause mucus production from the intestinal lining. Mucus from IBS is more aligned with diarrhea-predominant IBS, which comes with abdominal pain, bloating and sudden episodes of diarrhea. Ulcerative colitis causes colon inflammation and small ulcer development. The ulcers bleed and form mucus that passes along with the stool. Mucus from IBS and ulcerative colitis is not severe, but medical attention is necessary.
People with Chron's disease can get mucus in the stool through the development of anal fissures, otherwise known as a sore or ulcer, according to About.com. Leukemia, excessive laxative intake and constipation can cause anal fissures to develop. Warm baths, petroleum jelly and zinc oxide are beneficial treatments.
Bacterial infections in the form of salmonella, shigella, yersinia and campylobacter can form mucus in the intestines, as reported by About.com. These infections can also spawn diarrhea, fever and cramping. They may go away without medical intervention, but antibiotics are necessary in other cases.
Constipation, severe cramps and vomiting are other symptoms of bowel obstruction, according to About.com. An obstruction can be caused by scar tissue, an impacted stool, gallstones, a hernia, tumors or a physical object. Bowel obstructions require a visit to the hospital, and surgery may be necessary for removal.