Upper Left Aches? Exploring Digestion Slowdown and Spleen Changes in Pregnancy

Experiencing upper left abdominal pain during pregnancy can be unsettling. While many aches and pains are a normal part of a growing pregnancy, discomfort in the upper left side of the abdomen deserves thoughtful attention. In most cases, the cause is harmless — often related to digestion slowing down or natural body changes. However, in rare cases, it may signal something more serious.

Here's what you need to know about upper left abdominal pain in pregnancy, including common causes, when to seek help, and what you can do to feel better.

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Where Is the Upper Left Abdomen?

The upper left abdomen sits just below your left ribs. Important organs in this area include:

• The stomach
• The spleen
• The pancreas (toward the back)
• The left kidney
• Part of the colon
• Supporting muscles and ribs

During pregnancy, this area also feels pressure from the expanding uterus, especially in the second and third trimesters.

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Why Upper Left Abdominal Pain Happens During Pregnancy

1. Slower Digestion (Very Common)

One of the most frequent causes of upper left abdominal pain in pregnancy is slowed digestion.

Pregnancy hormones — especially progesterone — relax smooth muscle throughout your body. This includes your digestive tract. As a result:

• Food moves more slowly through your stomach and intestines
• Gas builds up more easily
• Bloating increases
• Constipation becomes more common

This can cause:

• Dull aching under the left ribs
• Cramping
• A feeling of fullness or pressure
• Sharp gas pains that come and go

As your uterus grows, it also pushes upward on your stomach and intestines, making these symptoms more noticeable.

What helps:

• Eating smaller, more frequent meals
• Avoiding heavy, greasy, or very spicy foods
• Drinking plenty of water
• Gentle walking after meals
• Increasing fiber slowly (if constipated)

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2. Gas Pain

Gas pain can be surprisingly sharp and intense. It may feel like:

• A stabbing pain under the left ribs
• Pain that moves or shifts
• Discomfort that improves after passing gas

Because the colon curves around the upper left abdomen (called the splenic flexure), trapped gas often causes discomfort specifically in this area.

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3. Acid Reflux or Indigestion

Pregnancy increases the risk of acid reflux due to hormonal relaxation of the lower esophageal sphincter and pressure from the uterus.

Symptoms may include:

• Burning in the chest or upper abdomen
• Pain after eating
• Sour taste in the mouth
• Bloating and discomfort in the upper left abdomen

This type of upper left abdominal pain often worsens when lying down.

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4. Muscle and Rib Stretching

As your baby grows, your rib cage expands. The muscles and ligaments around your abdomen stretch significantly.

This can cause:

• Tenderness under the left ribs
• Pain with movement
• Discomfort when twisting or changing position
• A sore or bruised feeling

This pain is usually mild to moderate and changes with posture.

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What About the Spleen?

The spleen sits in the upper left abdomen, tucked under the rib cage. It plays a role in:

• Filtering blood
• Fighting infection
• Recycling old red blood cells

In a healthy pregnancy, the spleen does not usually cause pain.

However, in rare situations, spleen-related problems can occur.

Possible Spleen-Related Causes (Rare)

• Enlarged spleen (splenomegaly) — may happen with certain infections or blood disorders
• Splenic rupture — extremely rare but serious
• Blood clotting disorders

These conditions are uncommon but may cause:

• Severe upper left abdominal pain
• Pain that spreads to the left shoulder
• Dizziness or fainting
• Rapid heart rate
• Signs of internal bleeding

If pain is sudden, severe, or associated with feeling faint, this is a medical emergency.

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Other Serious Causes of Upper Left Abdominal Pain in Pregnancy

Although most causes are harmless, some require urgent evaluation.

1. Preeclampsia (Sometimes Misinterpreted as Left-Sided Pain)

Preeclampsia typically causes right upper abdominal pain, but discomfort can sometimes feel more generalized.

Watch for:

• Severe headache
• Vision changes
• Swelling in hands or face
• High blood pressure
• Nausea after mid-pregnancy

This condition requires immediate medical care.

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2. Pancreatitis

Inflammation of the pancreas is uncommon in pregnancy but possible.

Symptoms include:

• Severe upper abdominal pain (may radiate to the back)
• Nausea and vomiting
• Fever
• Pain that worsens after eating

This condition requires prompt medical attention.

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3. Kidney Issues

Although kidney pain is typically felt in the back (flank pain), it can sometimes radiate forward.

Watch for:

• Fever
• Burning with urination
• Frequent urination
• Back pain
• Chills

Urinary tract infections are more common in pregnancy and should be treated quickly.

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When Should You Worry About Upper Left Abdominal Pain?

Seek immediate medical care if you experience:

• Sudden, severe pain
• Pain after injury or trauma
• Fainting or dizziness
• Shoulder pain with abdominal pain
• Heavy vaginal bleeding
• Fever with severe abdominal pain
• Persistent vomiting
• Chest pain or shortness of breath

Call your healthcare provider promptly if:

• Pain lasts more than a few hours and does not improve
• Pain keeps returning
• You feel generally unwell
• You have high blood pressure
• Something "just doesn't feel right"

It's always better to check than to ignore symptoms during pregnancy.

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How Doctors Evaluate Upper Left Abdominal Pain

Your healthcare provider may:

• Ask detailed questions about the pain
• Check your blood pressure
• Perform a physical exam
• Order blood tests
• Recommend an ultrasound (safe in pregnancy)

In most cases, evaluation shows a benign cause such as gas, reflux, or muscle strain.

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A Simple First Step: Symptom Review

If you are unsure whether your symptoms need urgent attention, you might consider using a free abdominal pain symptom checker to help you understand your discomfort and determine the best next steps for care.

This should never replace medical care — but it can be a helpful starting point.

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Practical Tips for Relief

If your doctor rules out serious causes, these strategies may help:

For Digestion Slowdown

• Eat smaller meals every 2–3 hours
• Avoid overeating
• Limit fatty or fried foods
• Stay upright after meals

For Gas Pain

• Gentle stretching
• Prenatal yoga
• Slow walking
• Warm (not hot) compress

For Muscle Pain

• Change positions slowly
• Use supportive pregnancy pillows
• Practice good posture
• Wear supportive maternity clothing

For Reflux

• Avoid lying down within 2 hours of eating
• Elevate the head of your bed
• Avoid trigger foods (spicy, acidic, chocolate)

Always check with your doctor before taking any medication during pregnancy.

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The Bottom Line

Most cases of upper left abdominal pain during pregnancy are caused by:

• Slowed digestion
• Gas buildup
• Acid reflux
• Muscle stretching

These are uncomfortable but not dangerous.

However, severe, sudden, or persistent pain — especially with other symptoms like dizziness, fever, vomiting, or high blood pressure — requires immediate medical attention.

Pregnancy changes your body in remarkable ways, but not every pain is "just part of it." Trust your instincts. If something feels serious or life threatening, speak to a doctor immediately or seek emergency care.

When in doubt, get checked. Your safety — and your baby's — always comes first.