Upper stomach pain during pregnancy: Third trimester

By the third trimester, your body is doing Olympic-level multitasking. Your baby is growing fast, your organs are politely being asked to scoot over, and your digestive system is suddenly moving like it has all the time in the world. So if you feel pain, pressure, burning, or soreness in the upper part of your stomach during late pregnancy, you are absolutely not alone.

That said, not every ache deserves the same reaction. Some upper stomach pain in the third trimester is common and annoying. Some is a flashing neon sign that says, “Please call your doctor now.” The trick is knowing the difference without spiraling every time your ribs get kicked from the inside like a tiny martial artist is renting space there.

This guide breaks down what upper stomach pain can mean in the third trimester, which symptoms may be normal, what red flags need urgent care, and what you can do to feel better while waiting for your body to stop treating your stomach like a folding chair.

What counts as upper stomach pain in late pregnancy?

People use the phrase upper stomach pain to describe a few different sensations. It may mean:

• Burning in the chest or upper abdomen after eating
• Pain just under the ribs
• A sore, stretched, bruised feeling across the upper belly
• Sharp pain on the right side under the ribs
• Pressure in the middle of the upper abdomen
• Pain that seems to wrap around to the back or shoulder

Location matters. Timing matters. Associated symptoms matter even more. Upper abdominal pain after a giant plate of spicy takeout may point toward reflux. Upper right abdominal pain with headache and vision changes is a very different story.

Why upper stomach pain is common in the third trimester

The third trimester usually starts at week 28 and continues until birth. During this phase, your uterus expands upward, your baby gains weight quickly, and the usual neighborhood layout of your abdomen becomes… creative. As a result, discomfort in the upper abdomen can happen for several reasons that are not automatically dangerous.

1. Heartburn and acid reflux

This is one of the biggest offenders. Pregnancy hormones can relax the valve between the stomach and esophagus, making it easier for stomach contents to move upward. Add the physical pressure of a growing uterus, and suddenly a modest sandwich can feel like a personal insult.

Heartburn often feels like:

• A burning sensation behind the breastbone
• Upper abdominal discomfort after meals
• A sour taste in the mouth
• Symptoms that get worse when lying down

In the third trimester, reflux can be especially dramatic at night. Your body is trying to sleep, your baby is trying to practice kickboxing, and your esophagus is filing complaints.

2. Pressure from the growing uterus and baby

Sometimes upper stomach pain is not really a stomach problem at all. It can simply be pressure from your uterus pushing upward. As your baby changes position, you may feel soreness under the ribs, stretching across the upper abdomen, or a localized jab where a foot is clearly trying to negotiate outside access.

This discomfort is often worse when:

• You sit in one position too long
• The baby is positioned high
• You eat a large meal
• You are already feeling bloated or constipated

3. Indigestion and slowed digestion

Pregnancy can slow the digestive tract. Food may sit longer in the stomach and intestines, which can cause bloating, fullness, burping, nausea, and general upper abdominal misery. This can feel dull, gassy, crampy, or heavy rather than sharp.

If the pain comes with fullness, belching, nausea, or discomfort after eating, indigestion may be part of the picture.

4. Rib and abdominal wall pain

The third trimester can make your upper abdomen feel tight and tender because the muscles and connective tissues are under strain. If your pain feels sore, positional, or related to movement, coughing, or twisting, the abdominal wall or rib cage may be the real source.

That kind of pain often improves when you change position, stretch gently, or rest.

When upper stomach pain may signal something more serious

This is the part nobody loves, but everybody needs. Upper stomach pain in late pregnancy can sometimes point to complications that need medical attention right away.

1. Preeclampsia

Preeclampsia is a pregnancy complication related to high blood pressure that can affect the liver, kidneys, brain, and placenta. It usually develops after 20 weeks and often shows up in the third trimester.

One of the classic warning signs is pain in the upper right abdomen or under the ribs. Some people describe it as severe heartburn, while others say it feels deep, constant, or impossible to ignore.

Other symptoms can include:

• Severe headache that does not go away
• Vision changes, including blurring, flashing lights, or spots
• Sudden swelling of the face or hands
• Nausea or vomiting that appears later in pregnancy
• Shortness of breath
• Feeling that the baby is moving less

If upper abdominal pain comes with any of those symptoms, do not try to diagnose it with crackers and optimism. Contact your obstetric provider immediately or go in for urgent evaluation.

2. HELLP syndrome

HELLP syndrome is a serious condition related to preeclampsia. The name sounds like a typo, but unfortunately it is very real. It involves problems with red blood cells, liver function, and platelets, and it can cause pain in the upper middle or upper right abdomen.

Symptoms may include:

• Upper abdominal pain
• Nausea and vomiting
• Headache
• Blurred vision
• Feeling generally very unwell

Because HELLP can worsen quickly, upper stomach pain that feels severe, unusual, or paired with these symptoms should be treated as urgent.

3. Gallbladder problems

Gallstones and gallbladder inflammation can also cause upper abdominal pain during pregnancy. The pain is often on the upper right side and may come on suddenly. Some people notice it after eating, especially after heavier or fatty foods.

Gallbladder pain may feel:

• Sharp or intense
• Located under the right ribs
• Worse after meals
• Associated with nausea or vomiting

If the pain is severe, recurrent, or comes with fever, vomiting, or jaundice, you need medical care.

4. Preterm labor

Upper abdominal pain is not the classic description of preterm labor, but abdominal cramping, tightening, and pressure can sometimes be confusing. If you are before 37 weeks and your discomfort comes with regular contractions, low backache, pelvic pressure, or a change in vaginal discharge, preterm labor needs to be ruled out.

Signs to watch for include:

• Repeated tightening of the uterus
• Cramping with or without diarrhea
• Watery, bloody, or mucus-like vaginal discharge
• Leaking fluid
• Persistent back pain

5. Placental abruption or other urgent causes

Severe abdominal pain with vaginal bleeding, uterine tenderness, contractions, or a dramatic change in how you feel may signal a serious complication such as placental abruption. This is not a “wait and see if tea helps” moment.

Appendicitis can also show up differently in pregnancy because the appendix may be pushed higher as the uterus grows. That means pain may feel higher in the abdomen than people expect.

How to tell whether the pain may be normal or not

Ask yourself these questions:

Does it feel like burning after meals?

That leans more toward heartburn or reflux.

Does it improve when you change position or rest?

That may point toward pressure, stretching, or musculoskeletal discomfort.

Is it severe, constant, or focused under the right ribs?

That deserves a call to your doctor or midwife, especially if it is new.

Does it come with headache, swelling, vision changes, or nausea?

Those are red flags for preeclampsia or HELLP syndrome.

Does it come with bleeding, fluid leakage, fever, or contractions?

That needs urgent assessment.

What you can do at home for mild upper stomach pain

If your provider has told you the pain is likely due to reflux, digestion, or normal pregnancy discomfort, these strategies may help:

Eat smaller meals

Large meals can crowd the stomach and make reflux worse. Smaller, more frequent meals are usually easier to tolerate.

Avoid trigger foods

Spicy, greasy, acidic, or very heavy foods can aggravate heartburn and indigestion.

Do not lie flat right after eating

Give your body time to digest. Staying upright after meals may reduce reflux symptoms.

Watch evening fluids and late-night meals

Some people find that drinking a lot right before bed or eating late makes nighttime symptoms worse.

Change positions slowly

If the pain is caused by stretching or pressure, slow movement can help prevent sudden pulling sensations.

Use gentle support

A pregnancy pillow, careful posture, or belly support can ease strain on the upper abdomen and ribs.

Call before taking medicine

Even over-the-counter remedies are worth checking with your prenatal care team before using in pregnancy.

When to call your doctor immediately

Call your obstetrician, midwife, or labor and delivery unit right away if upper stomach pain happens with any of the following:

• Severe or constant pain
• Pain in the upper right abdomen
• Severe headache
• Vision changes
• Sudden swelling of the hands or face
• Nausea or vomiting after mid-pregnancy
• Fever
• Vaginal bleeding
• Leaking fluid
• Regular contractions or cramping before 37 weeks
• Shortness of breath
• Decreased fetal movement

It is always better to make a cautious call than to sit at home trying to decide whether your pain is “real enough.” In pregnancy, that threshold should be low. No award is given for quietly suffering through warning signs.

What your provider may ask or check

If you call about upper stomach pain in the third trimester, your provider may ask:

• Where exactly is the pain?
• How long has it lasted?
• Is it burning, sharp, dull, or cramping?
• Did it start after eating?
• Do you have a headache, swelling, or vision changes?
• Any bleeding, leaking fluid, contractions, or fever?
• Is the baby moving normally?

Depending on your symptoms, they may check your blood pressure, urine, blood work, fetal movement, or contraction pattern. This is why calling matters. The cause of upper abdominal pain is not always obvious from symptoms alone.

Real-life experiences in the third trimester: what this pain can feel like

By late pregnancy, upper stomach pain often becomes one of those symptoms people struggle to describe. It is not always “pain” in the dramatic movie-scene sense. Sometimes it is a hot, rising burn after dinner. Sometimes it is a tight, bruised feeling under the ribs, as if the baby has set up a folding chair directly beneath your lungs. Sometimes it feels like fullness so intense that even a small meal seems unreasonable. And sometimes it is sharp enough to stop you mid-sentence and make you reconsider every life choice that led to eating tacos at 9:30 p.m.

Many pregnant people say reflux in the third trimester feels sneaky. It may start as mild heartburn, then show up stronger at night, especially when lying down. A person may wake up with a burning chest, a sour taste in the mouth, or the feeling that food is trying to reintroduce itself. Others describe upper abdominal pressure that gets worse when the baby stretches, turns, or plants a heel under the ribs like a tiny tenant ignoring the lease agreement.

There is also the emotional side of it. A new upper stomach ache during pregnancy can be hard to shrug off, especially late in the third trimester when every symptom seems loaded with meaning. Some people feel embarrassed calling their doctor because they worry the cause will turn out to be “just heartburn.” But in real clinical life, providers would much rather answer a cautious question than have someone ignore a meaningful symptom. Pregnancy has a rude habit of making common things feel scary and serious things look deceptively ordinary.

Another common experience is confusion about location. A person may say “my stomach hurts,” but what they actually mean is under the right ribs, in the center of the upper abdomen, or high enough that it almost feels like chest pain. That matters because reflux, gallbladder pain, muscular strain, and preeclampsia-related pain can all live in roughly the same general neighborhood. In other words, the upper abdomen is crowded, and the symptom map is not always neat.

People also notice patterns. If the pain flares after big meals, worsens when lying down, and improves with smaller portions, reflux becomes more likely. If it shows up after fatty foods and stays focused on the upper right side, gallbladder trouble may move higher on the list. If it arrives with a pounding headache, swelling, or visual changes, the experience shifts from “annoying pregnancy symptom” to “call now.”

Perhaps the most relatable part is how ordinary life collides with all of this. You may be trying to work, care for other kids, commute, sleep, or simply put on socks while carrying a full-size human in your abdomen. In that setting, upper stomach pain can feel physically uncomfortable and mentally draining. The best approach is not panic, but pattern recognition: notice what triggers it, what relieves it, and which warning signs travel with it. That combination often tells the real story faster than the pain itself.

Conclusion

Upper stomach pain during the third trimester can be completely ordinary, completely miserable, or occasionally a warning sign that deserves urgent medical attention. The most common causes include heartburn, reflux, indigestion, stretching, and pressure from your growing baby. But severe, constant, or right-sided upper abdominal pain, especially when paired with headache, vision changes, swelling, bleeding, fever, contractions, or reduced fetal movement, should never be ignored.

The bottom line is simple: late-pregnancy discomfort is common, but you do not have to guess alone. If the pain is mild and clearly linked to meals or position, practical changes may help. If the pain is intense, unusual, or comes with red-flag symptoms, call your prenatal care team right away. Your body is already busy building a person. It should not also be expected to run a diagnostic department without backup.