Crohn’s Disease and Ulcerative Colitis Symptoms

Crohn’s disease and ulcerative colitis can affect digestion, weight, energy, skin, joints, and growth, but a checklist cannot establish either diagnosis. This guide brings the recognized medical symptoms together with the patterns the GAPS sources use when choosing between No-Plant GAPS, Intro, and other protocol branches.^[1][2]

Common Crohn’s Disease Symptoms

NIDDK lists the most common Crohn’s disease symptoms as diarrhea, abdominal cramping or pain, and weight loss. Other recognized symptoms include anemia, fatigue, fever, joint pain or soreness, nausea, loss of appetite, vomiting, and tender skin changes.^[1]

Symptoms vary with the location and severity of the inflammation. Crohn’s disease can affect different parts of the digestive tract, so two people may not have the same pattern.^[1]

Common Ulcerative Colitis Symptoms

NIDDK lists diarrhea, blood or rectal bleeding, abdominal cramping or pain, mucus or pus in the stool, tenesmus, and bowel urgency among the common ulcerative-colitis symptoms. More extensive or severe disease may also bring fatigue, fever, nausea, vomiting, and weight loss.^[2]

Ulcerative colitis can alternate between remission and relapse. A quieter period does not mean the earlier pattern was imaginary, and a later return does not by itself explain what triggered it.^[2]

The Signs GAPS Uses to Choose a Starting Route

The 2020 GAPS book pays close attention to chronic diarrhea, especially when blood may be present, and to what happens when the person tries even small amounts of well-cooked plant food. It says to consider No-Plant GAPS when diarrhea, abdominal pain, or vomiting continues despite the gentle early Intro foods.^[3][4]

When stools become more normal and inflammatory markers reduce or disappear, the book says the person can try moving into Intro Stage 1.^[3] These are route-selection cues inside the GAPS protocol. They are not a substitute for the testing used to diagnose Crohn’s disease or ulcerative colitis.

Why Blood and Mucus Change the GAPS Plan

Blood and mucus affect more than the food branch. The 2020 book says not to use enemas while diarrhea includes blood and mucus. It directs the person toward Intro, No-Plant, or the GAPS Liquid Fast first and says enemas may be considered after about a year only when enough healing has occurred.^[5]

The Crohn’s and ulcerative colitis food guide explains those branches, the meat-stock rule, fasting limits, and the return to Intro.

Whole-Body Signs in the GAPS Framework

Gut and Physiology Syndrome places Crohn’s disease and ulcerative colitis in its autoimmune category and describes overlap between digestive symptoms and problems elsewhere in the body. The book’s broader list includes fatigue, joint or muscle pain, skin problems, allergies, asthma, hormonal changes, brain fog, mood changes, and sleep problems.^[6]

Those symptoms are not specific to inflammatory bowel disease. They matter here because the GAPS framework asks readers to look at the full pattern around the digestive symptoms instead of treating each complaint as unrelated.

One Pattern From the GAPS Case Material

The 2020 book follows a boy with ulcerative colitis and a learning disability. Before No-Plant GAPS, his recorded pattern included long-standing diarrhea, abdominal pain, feed refusal, nausea and vomiting, repeated antibiotics in infancy, hyperactivity, aggression, poor social and learning skills, blood and mucus in the stool, asthma, hay fever, anemia, poor growth, and a malnourished appearance.^[7]

That list belongs to one child in the source. It is useful as an example of how digestive, allergic, developmental, and growth concerns appeared together, but it is not a diagnostic template or a promised sequence for another child.

Illness and Symptom Return

The official GAPS FAQ describes a child whose Crohn’s symptoms returned after a viral illness. Campbell-McBride recommends returning to Intro and moving very slowly through the stages, with No-Plant first if needed.^[8] The practical point is to record the setback and the route change rather than assuming the earlier progress no longer counts.

What to Record

A useful record keeps the date beside the details that are easy to forget:

• stool frequency, consistency, urgency, blood, or mucus;
• abdominal pain, nausea, vomiting, appetite, and foods eaten;
• weight, growth, fatigue, fever, joint, skin, or allergy patterns;
• the current GAPS branch or Intro stage and each new food;
• medication timing, illness, sleep, and unusual stress.

The 90-Day Family Food Diary keeps those food and symptom details together so you can see a pattern across days instead of relying on memory.

Where to Go Next

• Read the complete Crohn’s disease, ulcerative colitis, and GAPS guide for the diagnosis distinction, source history, medication overview, and recovery account.
• Read what causes Crohn’s disease and ulcerative colitis in the GAPS framework for the gut-flora, gut-wall, immune, and probiotic mechanism.
• Use the food and protocol guide when the symptom pattern changes which GAPS branch comes next.

Frequently Asked Questions

Does This Checklist Diagnose Inflammatory Bowel Disease?

No. Crohn’s disease and ulcerative colitis are diagnosed through medical history, examination, and testing. Crohn’s testing may include blood and stool tests, endoscopy, biopsy, and imaging; ulcerative-colitis testing also uses blood and stool tests and endoscopy of the large intestine.^[9][10]

Does Everyone Have Blood in the Stool?

No. Blood is common in ulcerative colitis and can appear in inflammatory bowel disease, but symptom patterns and severity vary. Crohn’s disease may present with diarrhea, pain, and weight loss without that one sign.^[1][2]

Do Joint or Skin Symptoms Prove the Gut Is the Cause?

No. They are recognized in Crohn’s disease and also appear in the broader GAPS symptom framework, but neither one establishes a diagnosis or one universal cause.^[1][6]

References

1. National Institute of Diabetes and Digestive and Kidney Diseases. “Symptoms and Causes of Crohn’s Disease.” Accessed October 7, 2026.
2. National Institute of Diabetes and Digestive and Kidney Diseases. “Symptoms and Causes of Ulcerative Colitis.” Accessed October 7, 2026.
3. Campbell-McBride, N. Gut and Physiology Syndrome (2020), “Diarrhoea,” pp. 369–370.
4. Campbell-McBride, N. Gut and Physiology Syndrome (2020), “No-Plant GAPS Diet,” pp. 192–194.
5. Campbell-McBride, N. Gut and Physiology Syndrome (2020), “Enemas,” p. 374.
6. Campbell-McBride, N. Gut and Physiology Syndrome (2020), “Gut and Physiology Syndrome,” pp. 9–10.
7. Campbell-McBride, N. Gut and Physiology Syndrome (2020), ulcerative-colitis case study, pp. 197–199.
8. Campbell-McBride, N. “Crohn’s disease and ulcerative colitis,” Q66, GAPS FAQs.
9. National Institute of Diabetes and Digestive and Kidney Diseases. “Diagnosis of Crohn’s Disease.” Accessed October 7, 2026.
10. National Institute of Diabetes and Digestive and Kidney Diseases. “Ulcerative Colitis.” Accessed October 7, 2026.