Diarrhea During Pregnancy: What’s Normal and What Helps

A bout of diarrhea can feel especially unsettling when you’re pregnant—partly because your body is already working overtime, and partly because it’s hard not to wonder whether it could affect your baby.

Fortunately, most cases are short-lived and manageable at home. The key is knowing the likely causes, how to prevent dehydration, and when symptoms warrant a call to your prenatal care team.

Is diarrhea “normal” in pregnancy?

Diarrhea isn’t considered a hallmark pregnancy symptom the way nausea or constipation can be. But it’s also not unusual for pregnant people to experience occasional loose stools—especially if diet changes, prenatal vitamins, or pregnancy-related shifts in digestion are in the mix. In many cases, diarrhea during pregnancy is caused by the same things that cause diarrhea when you’re not pregnant: a stomach virus, foodborne illness, or a reaction to something you ate.

Common Causes of Diarrhea During Pregnancy

Stomach Viruses

Viral gastroenteritis can cause sudden diarrhea, nausea, vomiting, and fatigue. It’s usually self-limited, but the combination of vomiting + diarrhea increases dehydration risk—something to take seriously during pregnancy.

Foodborne Illness

Pregnancy changes the immune system in ways that can make foodborne infections more serious. Food poisoning during pregnancy can cause serious complications—contact your provider right away if you suspect it. Some infections (like Listeria) may cause mild GI symptoms in the pregnant person but pose outsized risks to the fetus.

Dietary Shifts

More fiber, more produce, new supplements, and changes in meal timing can all alter bowel habits. Sudden increases in fiber or sugar alcohols (found in some “sugar-free” foods) can trigger loose stools.

Prenatal Vitamins and Supplements

Iron more commonly causes constipation, but magnesium (sometimes used for leg cramps or constipation) can loosen stools. Always run supplement changes by your clinician!

Antibiotics

If you’re taking antibiotics, diarrhea can happen because the medication disrupts gut bacteria. If diarrhea is severe, persistent, or accompanied by fever, call your provider.

Treating Pregnancy Diarrhea at Home

If symptoms are mild and you’re otherwise feeling okay, these strategies are commonly recommended:

Prioritize fluids (and electrolytes).

With diarrhea, the primary concern is fluid and electrolyte loss. Dehydration can become serious quickly if you can’t keep fluids down or diarrhea is frequent. Symptoms include dark urine, dizziness, confusion, and decreased urination.

Sip water frequently. If you’re queasy, small sips can be easier than large glasses. Consider an oral rehydration solution (ORS) or rehydration sachets if stools are frequent or watery.

Skip sugary sodas and fruit juices while symptoms are active—they can worsen diarrhea for some people. Seek medical help if diarrhea lasts 24 hours or more or if you can’t keep down fluids.

Read more about the importance of hydration during pregnancy!

Eat in a “gentle” way.

There’s no single perfect diarrhea diet, but many people do well with bland, lower-fat foods in small portions until stools firm up. If eating worsens symptoms, focus on fluids first and try food again later.

Rest—and reduce spread.

If this is viral, rest matters, and so does hygiene. The NHS recommends staying home and careful handwashing because diarrheal illnesses spread easily.

Can I take anti-diarrhea medicine while pregnant?

Your first line of defense should be care at home—water, electrolytes, gentle eats, etc. If you feel you need something else, it’s super important that you speak to your physician.

The jury is still out on whether loperamide (aka Imodium) is safe for pregnancy. The studies are few and far between, and the results are mixed—and some public health authorities, like the NHS advise against it.

If you’re considering any medication—especially if you have fever, blood in stool, recent travel, or suspect food poisoning—contact your OB/midwife first.

When to Call Your Healthcare Provider

Call your prenatal care team promptly if any of the following apply:

• You can’t keep fluids down, or you have signs of dehydration (dark urine, dizziness, confusion, urinating less).
• Diarrhea lasts 24 hours or more, especially if it’s frequent or worsening.
• Bloody or black stools, significant abdominal pain, or a high fever.
• You suspect food poisoning.

If you’re late in pregnancy and also having pelvic pressure, contractions, or fluid leakage, call right away—those symptoms deserve urgent guidance, even if diarrhea seems like the main issue.

How to Reduce Your Odds of Food-Related Diarrhea

Because foodborne illness poses special risks in pregnancy, prevention is worth the effort:

• Follow the CDC’s pregnancy-specific safer food choices (for example, avoiding unheated deli meats and choosing pasteurized dairy).
• Use the FDA’s practical food safety steps for pregnancy—especially around refrigeration, avoiding unpasteurized products, and preventing cross-contamination.

The Bottom Line

Most diarrhea during pregnancy is temporary and resolves with hydration, rest, and gentle eating. But pregnancy lowers the threshold for checking in—especially if you might be dehydrated, can’t keep fluids down, have fever or blood in the stool, or suspect food poisoning. When in doubt, a quick call to your prenatal care team is a smart, simple way to protect both you and your baby.

More on Pregnancy Symptoms:

• Relieve Your Worst Pregnancy Symptoms With These Science Backed-Solutions
• Natural Ways to Relieve Pregnancy Heartburn
• Pregnancy Bloating: What’s Normal—and What Helps
• How to Handle Swollen Feet and Ankles in Pregnancy

***

Disclaimer: The information on our site is NOT medical advice for any specific person or condition. It is only meant as general information. If you have any medical questions and concerns about your child or yourself, please contact your health provider.