If it is not Crohn's disease, what else could it be?

If symptoms are not caused by Crohn's disease, other explanations include infection, food intolerance, irritable bowel syndrome, and coeliac disease. Medication effects and other bowel conditions can also cause diarrhoea or abdominal pain. Symptoms overlap, so a diagnosis cannot be made from one symptom or one scan alone.

The timing, duration, stool changes, pain pattern, appetite, weight change, fever, travel, medicines, and family history all add useful clues. A short illness after exposure to infection differs from symptoms that recur with certain foods or stress. Blood in stool, nighttime diarrhoea, anaemia, or ongoing weight loss may prompt more urgent investigation. Crohn's disease is one possible explanation, but similar symptoms can arise from conditions affecting digestion, absorption, or bowel movement.

Keep a brief record of bowel frequency, stool appearance, pain location, meals, medicines, and associated symptoms. Arrange a GP consultation if symptoms continue, recur, or limit daily activities. The clinician may examine your abdomen and request a blood test or stool testing; further tests depend on the findings. Avoid restrictive diets or stopping prescribed medicine without advice, and replace fluids when diarrhoea is present.

Seek urgent care for severe or rapidly worsening abdominal pain, a swollen abdomen, repeated vomiting, inability to keep fluids down, black or bloody stool, fainting, or confusion. Prompt review is also needed for persistent fever, unintentional weight loss, or diarrhoea that is waking you at night. These features do not identify one diagnosis, but they can signal a need for timely examination and testing.

Which causes best fit my symptom pattern? What blood or stool tests are appropriate? Could a medicine or food intolerance be contributing? What changes should make me seek urgent help?