What are the causes of diarrhea in patients with colitis?

Mar 21, 2025 Source: Cainiu Health
Dr. Shen Yonghua
Introduction
In general, possible causes of diarrhea in patients with colitis may include unhygienic food, intestinal sensitivity, infectious colitis, ulcerative colitis, radiation enteritis, and so on. Symptomatic management through general treatment and medication is usually required. In daily life, maintaining good dietary habits and personal hygiene can help prevent the occurrence of colitis and diarrhea.

Generally, possible causes of diarrhea in patients with colitis may include unhygienic food, intestinal sensitivity, infectious colitis, ulcerative colitis, and radiation-induced enteritis. Symptomatic management usually involves general treatments and medication therapy. If discomfort occurs, timely medical consultation is recommended, and treatment should be conducted under a physician's guidance. Detailed analysis is as follows:

1. Unhygienic Food

Consumption of expired or spoiled food may introduce harmful substances that irritate the intestines, accelerate intestinal motility, and weaken absorption function, thus causing diarrhea, which may be accompanied by symptoms such as abdominal pain, nausea, vomiting, and fever. Avoid eating unhygienic food and pay attention to food storage and preservation.

2. Intestinal Sensitivity

Certain individuals may be sensitive to specific foods or ingredients, such as lactose intolerance or food allergies, which may also lead to colitis and diarrhea. Symptoms may include abdominal pain, bloating, rash, and itching. It is recommended to avoid consuming allergenic or intolerant foods and, under a physician's guidance, use medications such as Cetirizine Hydrochloride Tablets, Loratadine Tablets, and Promethazine Hydrochloride Tablets for treatment.

3. Infectious Colitis

Pathogens such as Salmonella, Escherichia coli, and Norovirus can multiply in the intestines and produce toxins that damage the intestinal mucosa, trigger inflammatory responses, accelerate intestinal motility, and impair absorption function, leading to diarrhea. Symptoms may include abdominal pain, fever, nausea, and vomiting. It is recommended to use medications such as Amoxicillin Capsules, Cefradine Capsules, and Acyclovir Tablets under a physician's guidance.

4. Ulcerative Colitis

Ulcerative colitis may be associated with immune abnormalities, genetic factors, environmental factors, etc. Inflammation damages the intestinal mucosa, accelerates intestinal motility, weakens absorption function, and causes diarrhea, which may be accompanied by symptoms such as abdominal pain, mucus or pus-filled stools, and tenesmus. It is recommended to follow medical advice and use medications such as Dexamethasone Sodium Phosphate Injection, Prednisone Acetate Tablets, and Azathioprine Tablets to alleviate symptoms.

5. Radiation-Induced Enteritis

Radiation-induced enteritis is an intestinal inflammatory condition caused by radiotherapy for malignant tumors in the pelvis or abdomen. Radiation damages the intestinal mucosa, accelerates intestinal motility, weakens absorption function, and causes diarrhea, which may be accompanied by symptoms such as abdominal pain, nausea, vomiting, and blood in the stool. It is recommended to follow medical advice and use medications such as Smectite Powder, Sucralfate Chewable Tablets, and Colloidal Bismuth Pectin Capsules to relieve symptoms.

In daily life, maintaining good eating habits and personal hygiene can help prevent the occurrence of colitis and diarrhea.

References

[1] Ma Ruofan. A Meta-analysis and Medication Pattern Mining Study of the Treatment of Radiation-Induced Enteritis in Cancer Patients Using the Method of Clearing Heat and Resolving Dampness [D]. Beijing University of Chinese Medicine, 2022.

[2] Zhang Xinmei, Zhao Youcai, Zhang Zhenyu. Clinical Characteristics Analysis of Cytomegalovirus Colitis [J]. Chinese Journal of Gastroenterology and Hepatology, 2019, 28(07): 786-790.