Gas and bloating in pregnancy: why it happens and how to ease it

Does your belly puff up like a balloon by evening? Does gas pain worry you? Gas and bloating can show up in any trimester and are usually harmless, but annoying.

Why does it happen?

The hormone progesterone rises in pregnancy and relaxes the muscles of the gut. When the bowel works more slowly, food stays longer and more gas builds up. The growing womb can also press on the bowel in later weeks and add to the bloated feeling. This is part of how your body adapts to pregnancy.

Habits that can add gas

• Eating very fast and swallowing air while eating
• Lots of beans, cabbage or onions (you do not need to give up all of them; watch which ones trigger you)
• Fizzy drinks and drinking through a straw
• Large portions and heavy late meals
• Staying still for long periods

8 tips that may help

1. Eat smaller, more frequent meals and chew slowly.
2. Take a gentle 10–15 minute walk after eating.
3. Avoid fizzy drinks and chewing gum.
4. Drink plenty of water; raise fibre gradually.
5. Note down for a few days which foods bother you.
6. Wear comfortable clothes that do not squeeze your belly.
7. A warm shower or a warm (not hot) compress on the belly may help you relax.
8. Gentle pregnancy yoga, or lying down and drawing your knees towards your chest, may get gas moving.

Constipation often makes gas and bloating worse; you can also look at the guide article on constipation and indigestion. Before using any medicine or herbal product for gas, ask your doctor or pharmacist.

Telling gas pain from other pain

Gas pain usually moves around, eases when you pass gas or go to the toilet, and is short. Hardening of the belly with pain that comes at regular, closer intervals may be contractions; if you are unsure, noting the length and spacing with the contraction timer in the app can help your doctor. Do not wait out a sudden, one-sided or steadily worsening pain in the lower belly by assuming it is gas.

Keeping a food diary

Which food causes gas varies from person to person. Writing short notes for a week on what you ate, when you felt bloated and how strong the gas was helps you see a pattern. Rather than cutting everything at once, leave out one suspected food for a few days and watch the result. Eating at regular times while getting enough fibre and fluid also supports the rhythm of the bowel. These notes also help when you talk to your doctor.

When to contact your doctor

• Pain is severe, constant or getting worse
• Bloating comes with fever, vomiting, diarrhoea or blood in the stool
• You have vaginal bleeding or watery discharge
• You feel regular tightening and pain (especially before week 37)
• You cannot pass gas or stool and your belly is very tight
• For sudden, very severe belly pain, fainting or shortness of breath, call 112 (in Turkey) or your local emergency number

Frequently asked questions

Can gas harm my baby? No; gas does not pass to the baby and does not harm it.

Will bloating last until birth? In most people it comes and goes and may ease with diet and movement.

Can I drink herbal tea for gas? Some herbal teas may not be suitable in pregnancy. Ask your doctor or pharmacist before using them; water and warm drinks are usually a safe start.

My belly looks very swollen, is that a problem? A swollen belly is common in pregnancy and is often a mix of gas and the growing womb. If pain, fever or bleeding come with it, tell your doctor.

These symptoms are mostly harmless; this article is for information, and you should feel free to ask your doctor anything that worries you.