Diarrhoea persistent causes in pregnancy

Overview

Persistent diarrhoea in pregnancy means having loose, watery bowel movements that last for more than a few days while you are pregnant. It can be uncomfortable and worrying, but in most cases it is temporary and not harmful to you or your baby.

Mild, short-term diarrhoea is fairly common during pregnancy, but persistent diarrhoea (lasting more than a few days) is less common and should be discussed with your midwife or doctor.

It can affect anyone who is pregnant, but women who have a history of irritable bowel syndrome (IBS) or who are prone to food intolerances may be more likely to experience it.

Symptoms

Common symptoms

• Loose, watery stools that occur three or more times a day
• Stomach cramping or discomfort
• Feeling an urgent need to have a bowel movement
• Nausea or queasiness
• Feeling tired or weak

Symptoms in children

• Not applicable for this article (focused on pregnancy)

Symptoms in older adults

• Not applicable for this article (focused on pregnancy)

Causes

Main causes

• Hormonal changes during pregnancy can slow or speed up digestion, sometimes causing diarrhoea.
• Infections like stomach flu (viral gastroenteritis) or food poisoning from bacteria or parasites.
• Irritable bowel syndrome (IBS) or other digestive conditions such as inflammatory bowel disease (Crohn's disease or ulcerative colitis).
• Food intolerances or sensitivities (e.g., lactose intolerance).
• A side effect of some prenatal vitamins or supplements (though rare).

Risk factors

• History of IBS or other bowel disorders
• Weakened immune system
• Travel to areas with poor sanitation or contaminated water
• Eating undercooked food or unpasteurised dairy products
• Taking antibiotics or other medications that affect the gut

When to see a doctor

See a doctor urgently if:

• If you have any signs of dehydration (see emergency symptoms above)
• If you have blood in your stool or severe abdominal pain
• If you have a high fever or vomiting along with diarrhoea

Book a routine appointment if:

• If diarrhoea has lasted more than 2 to 3 days
• If you have mild cramping but no other concerning symptoms
• If you are worried about how it may affect your pregnancy

Diagnosis

Your healthcare provider will ask about your symptoms, how long they have lasted, your medical history, and what you have been eating. They may also do a physical exam.

Tests that may be done

• Stool sample to check for infections (bacteria, parasites, or viruses)
• Blood tests to look for signs of infection, inflammation, or dehydration
• In some cases, a urine test to check hydration levels

What to expect at your appointment

Your doctor or midwife will listen carefully and may ask you to keep a diary of your bowel movements and symptoms. Most tests are simple and painless. If a cause is found, treatment will be tailored to you and your pregnancy.

Treatment

Treatment for persistent diarrhoea in pregnancy focuses on preventing dehydration and addressing the underlying cause. Most cases can be managed at home with rest and rehydration, but always check with your healthcare provider first before taking any over-the-counter products.

Self-care at home

• Drink plenty of clear fluids: water, clear broths, or oral rehydration solution (available from pharmacies and made with plain water, salt, and sugar as per instructions).
• Eat small, bland meals such as plain rice, toast, bananas, and boiled potatoes. Avoid fatty, spicy, or very sugary foods.
• Rest as much as you can. Your body needs energy to recover and to support your baby.
• Avoid dairy products, caffeine, and high-fibre foods until diarrhoea improves.
• Wash your hands thoroughly with soap and water after using the toilet and before eating to prevent spreading infection.

Medical treatments

If an infection is found, your doctor may prescribe antibiotics that are safe to take in pregnancy. If a chronic condition like IBS or inflammatory bowel disease is causing the diarrhoea, your doctor will discuss treatments that are suitable for pregnancy. In all cases, the goal is to manage symptoms safely without harming your baby. Never take any anti-diarrhoea medicine without first asking your healthcare provider.

When is surgery considered?

Surgery is not typically needed for persistent diarrhoea during pregnancy. In the rare case of a serious condition like bowel obstruction or severe inflammation, your doctor will explain all options.

Living with this condition

Living with persistent diarrhoea while pregnant can be tiring and stressful. You may need to plan ahead: always know where the nearest toilet is, and keep a small bag with spare clothes and wipes. Stay in touch with your healthcare provider so they can monitor your progress.

Lifestyle tips

• Take gentle walks if you feel up to it – light activity can help digestion.
• Avoid stress where possible – try relaxation techniques like deep breathing or prenatal yoga (if approved by your doctor).
• Make sure you get plenty of rest – your body needs energy to heal and to grow your baby.

Diet and exercise

Eat small, frequent meals that are easy on your stomach. Include foods like oats, white rice, steamed vegetables, and lean chicken or fish. Avoid raw vegetables, high-fibre grains, and greasy foods until the diarrhoea settles. Once you feel better, slowly reintroduce your normal diet. Light exercise like walking is usually fine, but listen to your body and rest when needed.

Mental health and emotional wellbeing

Dealing with ongoing diarrhoea can cause anxiety, especially during pregnancy when you are already concerned about your baby's health. It may also feel embarrassing or isolating. It is normal to feel this way. Talk to your partner, a friend, or your healthcare provider about how you are feeling.

Prevention

Not all cases can be prevented, but you can reduce your risk by practicing good food hygiene, washing hands regularly, avoiding foods that commonly cause illness (like raw or undercooked meat, shellfish, and unpasteurised milk), and staying up-to-date with recommended travel vaccinations before going abroad.

Vaccines

Some vaccines, like the rotavirus vaccine, can prevent certain causes of diarrhoea, but this is given in childhood. Ask your healthcare provider about any travel vaccines if you are planning a trip.

Screening programmes

No routine screening for diarrhoea is recommended in pregnancy. If you have ongoing digestive issues, your doctor may suggest tests to look for infections or underlying conditions.

Complications

If left untreated

• Dehydration can become severe, which may affect your baby's fluid balance and your own health.
• Electrolyte imbalances (salts in your body) can cause muscle cramps, weakness, or irregular heartbeat.
• Weight loss or poor nutrition if diarrhoea continues for a long time.
• In very rare cases, could lead to preterm labour if you become severely dehydrated or have a serious infection.

Long-term outlook

With proper care and guidance from your healthcare provider, most cases of persistent diarrhoea in pregnancy resolve without any lasting problems. Your body and baby are resilient, and getting the right support early makes the biggest difference. You can expect to recover fully and continue a healthy pregnancy.

Find support

External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.