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How to prepare for a gastroenterologist appointment, and what to expect

By Paul Mederos, founder of Kasane · Updated

To prepare for a gastroenterologist appointment, bring a one-page summary of your symptoms (when they started, how often, what makes them better or worse), what you've already tried and how it went, every medicine and supplement you take, and your three most important questions. Put the most important question first.

Appointments go fast, and months of symptoms are hard to explain from memory. A page you can hand over, with your detailed notes behind it, helps the doctor see the pattern and leaves time for your questions. If your notes go back years, here's how to turn them into one page.

What to expect at the first visit

A first visit is mostly conversation. For gut symptoms like IBS, "doctors review your symptoms and medical and family history and perform a physical exam," which can include tapping on your abdomen to check for tenderness or pain. "In some cases, doctors may order tests to rule out other health problems" (NIDDK).

If you've had tests before, IFFGD suggests you "mention tests and procedures you have completed and (if possible) bring those results to the visit" (IFFGD).

Procedures are different from a consultation. Before an upper endoscopy, for example, "your doctor may ask you not to eat or drink for up to 8 hours" (NIDDK), and a colonoscopy comes with written bowel prep instructions (NIDDK). For a first consultation, follow whatever your clinic tells you when you book.

What a GI doctor will ask

The National Institute on Aging's guidance lists the questions doctors ask about any symptom: when it started, what time of day it happens, how long it lasts, how often, whether it's getting better or worse, and whether it stops you doing your usual things (NIA).

For gut symptoms, NIDDK adds family history of digestive diseases such as celiac disease, colon cancer and inflammatory bowel disease, your medicines, recent infections, stressful events around when symptoms started, and what you eat (NIDDK).

Timing is part of the picture too. NIDDK says a doctor may diagnose IBS if symptoms such as belly pain linked to bowel movements have happened at least once a week in the last three months and first started at least six months ago, and that they may diagnose it even if you've had symptoms for a shorter time. So there's no need to wait before you go. If you know roughly when yours started, write it down.

One part of how doctors diagnose IBS, from NIDDK, which adds that they may diagnose it sooner. You don't need to wait six months to see a doctor. If you know roughly when yours started, put the month and year on your summary.

The one-page summary

Here's a template built from those questions. Keep each line short: the NIA's advice is to be clear and concise.

SectionWhat to write
Main concernOne line in your own words, e.g. "Bloated most afternoons for about a year"
When it startedMonth and year, and anything that was going on then
PatternHow often, what time of day, how long it lasts, better or worse lately
What makes it better or worseFoods, meals, stress, sleep, your cycle, exercise
Bowel habitsFrequency and stool type on the Bristol Stool Form Scale
ImpactWhat it stops you doing, or makes harder
Already triedEach change, how long you tried it, and what happened
Medicines and supplementsNames and doses, including over-the-counter and vitamins
Family historyCeliac disease, IBD, colon or ovarian cancer
Warning signsYes or no for each item in the list below
Top three questionsMost important first
My summary for the visitIllustrative example
Warning signs: family history of celiac disease (aunt). None of the listed symptoms.
Main concernBloated most afternoons for about a year
When it started
Around September last year, after a stomach bug on a trip
Pattern
4 or 5 days a week, mid-afternoon, lasts 2–3 hours, a little worse lately
Better or worse
Worse after big lunches and on stressful days
Bowel habits
Once a day, mostly Type 4, sometimes Type 6
Impact
Skipping afternoon plans on bad days
Already tried
Less coffee, 2 weeks: no clear effect
Lunch away from the desk, 3 weeks: fewer bad days
Medicines and supplements
Multivitamin, daily · Ibuprofen 200 mg, about twice a month
Family history
Aunt with celiac disease
Top three questions
  1. What do you think is most likely, and what else are you considering?
  2. Do I need any tests, and should I keep eating normally until then?
  3. Would it help to work with a dietitian?
The template, filled in. The main concern fits on one line, "already tried" says how long and what happened (including no clear effect), and the questions are numbered so the most important gets asked first.

A few tips make it more useful. AHRQ suggests bringing "all the medicines you take" to the appointment, because doses are easy to misremember; photos of the labels are a handy backup (AHRQ). Keep your food and symptom diary with you in case the doctor wants detail, but lead with the summary. And if you can, bring someone: the NIA notes a companion can remind you what you planned to discuss and take notes.

Questions worth asking

Start with your own top three. These are good additions, several adapted from AHRQ's list of questions to ask:

  • What do you think is most likely, and what else are you considering?
  • What is this test for, and when will I get the results?
  • Is there anything I should keep eating, or avoid changing, before a test?
  • Would it help to work with a dietitian?
  • What should I track between now and our next visit?
  • Which symptoms should make me call before then?

The question about not changing anything is worth asking directly. Celiac testing, for example, only works while you're still eating gluten, in more than one meal a day for at least six weeks beforehand (NICE NG20).

Warning signs to mention first

Put these at the top of your summary if any apply:

  • Blood in your stool, or black and tarry stools (NIDDK)
  • Weight loss you can't explain (ACG)
  • Anemia or low iron (ACG)
  • Symptoms that started later in life, especially after 50 (ACG)
  • Diarrhea that wakes you at night (BSG 2021)
  • A family history of bowel cancer, ovarian cancer, celiac disease or IBD (NIDDK, BDA)

Don't wait for the appointment if you have severe stomach pain that came on suddenly, are vomiting blood, or have trouble breathing. Call 911 or go to an emergency room (NHS).

Questions people ask

What should I bring to my first gastroenterologist appointment?

A one-page summary of your symptoms and what you've tried, a complete list of medicines and supplements with doses (or the bottles themselves), any previous test results, your family history, and your top three questions written down.

What does a gastroenterologist do on the first visit?

Mostly they listen and ask questions: about your symptoms, your medical and family history, your medicines and what you eat. They'll often examine your abdomen, and they may order tests afterward to rule out other problems.

What should I not do before a gastroenterologist appointment?

Don't cut out gluten or other foods before testing unless your doctor asks you to, because some tests need you to keep eating them. Don't stop prescribed medicines on your own. And follow any instructions your clinic sends, especially before a procedure.

How do I describe my symptoms to a doctor?

Cover when they started, how often they happen, what time of day, how long they last, whether they're getting better or worse, what makes them better or worse, and how they affect your daily life. Be specific and concise.

Should I bring my whole food diary?

Bring it, but lead with a one-page summary. Doctors have limited time, and the summary helps them see the pattern quickly. The diary is there if they want to look closer.

What questions should I ask a gastroenterologist about IBS?

Ask what they think is most likely and why, whether any tests are needed and what they're for, whether a dietitian or a diet like low-FODMAP makes sense for you, what to track before your next visit, and which symptoms should prompt a call sooner.