Introduction
Inflammatory bowel disease (IBD) is a chronic condition characterized by persistent inflammation of the digestive tract, leading to symptoms such as abdominal pain, diarrhea, rectal bleeding, and weight loss. IBD affects millions of people worldwide, with most cases occurring before age 30, though it can appear at any age. The disease is more common in white individuals but is increasingly seen across all racial and ethnic groups.
Types
- Ulcerative Colitis: Involves inflammation limited to the colon and rectum. Subtypes are classified based on the extent, e.g., ulcerative proctitis (limited to rectum), pancolitis (entire colon), etc.
- Crohn’s Disease: Can affect any part of the gastrointestinal tract from mouth to anus, most frequently the last part of the small intestine and the colon.
- Other forms: Microscopic colitis, diversion colitis, intestinal Behçet’s, lymphocytic and collagenous colitis.
Causes
- Genetic predisposition
- Environment & lifestyle: Urbanization, Western diet (high meat/sugar, low fiber/fruit), low vitamin D.
- Gut microbiome & barrier dysfunction: Persistent dysbiosis triggers immune activation.
- Immune dysregulation: Overactive T‑cells and cytokine response; biologic therapies target TNF‑α, JAK1, etc.
Risk Factors
- Age: Most often diagnosed before 30, but possible at older ages.
- Family History: Higher risk if a first-degree relative is affected.
- Ethnicity: Higher prevalence in whites, but rising globally.
- Cigarette Smoking: Increases risk for Crohn’s but seemingly reduces ulcerative colitis risk, though overall health risks mean smoking is not recommended.
- NSAIDs: May increase risk or worsen IBD.
- Antibiotic Exposure in Early Life: Potentially increases risk.
Signs & Symptoms
- Diarrhea (often bloody).
- Abdominal pain and cramping.
- Weight loss.
- Fatigue
- Rectal bleeding
- Urgency and frequency of bowel movements.
- Fever
- Anemia
- Delayed growth or malnutrition (especially in children).
Complications
- Local Complications:
- Strictures (narrowing of the bowel).
- Perforation (tear in the intestinal wall).
- Abscesses and fistulas (abnormal connections between bowel and other organs).
- Increased risk of colon cancer (especially with long-standing disease).
- Systemic Complications:
- Malnutrition
- Osteoporosis
- Skin, eye, and joint inflammation
- Increased risk for blood clots
- Treatment-related: Immunosuppression (infection risk), corticosteroid side effects.
Prevention
- Nutrition: Mediterranean-style diet, fruits, vegetables, low processed meat/sugar reduce flares.
- Smoking cessation: Essential in CD management; harmful for overall health.
- Vaccination/screening: Regular colonoscopies, cancer surveillance; manage osteoporosis, infections.
When to Seek Medical Attention
- Seek medical advice if you experience:
- Diarrhea lasting more than one week.
- Persistent abdominal pain or bloating.
- Blood or mucus in stool
- Unintended weight loss
Severe fatigue.
- Seek immediate emergency care for:
- Severe abdominal pain.
- Heavy or persistent rectal bleeding.
- Vomiting blood or stool.
- Signs of shock (e.g., rapid heartbeat, confusion, very low blood pressure).
Bibliography
[1] https://www.mayoclinic.org/diseases-conditions/inflammatory-bowel-disease/symptoms-causes/syc-20353315
[3] https://my.clevelandclinic.org/health/diseases/15587-inflammatory-bowel-disease
[9] https://www.cdc.gov/inflammatory-bowel-disease/about/index.html
[2] https://www.ncbi.nlm.nih.gov/books/NBK470312/
[4] https://pmc.ncbi.nlm.nih.gov/articles/PMC8720971/
[5] https://www.nhs.uk/conditions/inflammatory-bowel-disease/
[6] https://en.wikipedia.org/wiki/Inflammatory_bowel_disease
[7] https://www.hopkinsmedicine.org/health/conditions-and-diseases/inflammatory-bowel-disease
[8] https://www.crohnscolitisfoundation.org/sites/default/files/2019-02/Updated%20IBD%20Factbook.pdf
[10] https://www.mdpi.com/1422-0067/25/13/7062
[11] https://www.medicalnewstoday.com/articles/316395