Round Ligament Pain: That Sharp Pain in Your Side

TL;DR

• Round ligament pain is a sharp, stabbing pain in your lower belly or groin — usually on the right side — that's completely normal during pregnancy.
• It happens because the ligaments supporting your uterus are stretching as your belly grows.
• It's most common in the second trimester and is triggered by sudden movements like standing up, sneezing, or rolling over in bed.
• The pain is brief. If it's constant or comes with other symptoms, call your provider.

What Just Happened? That Sudden Sharp Pain

You sneezed. Or you stood up too fast. Or you rolled over in bed. And then — a sudden, sharp, stabbing pain shot through your lower belly or groin. It took your breath away for a second, and then it was gone.

If this sounds familiar, you've probably just met round ligament pain. It's startling, it can be scary, and it's one of the most common complaints of the second trimester. But it's also completely harmless.

What Are the Round Ligaments?

The round ligaments are two rope-like bands of connective tissue that run from the top of your uterus down into your groin on each side. Before pregnancy, your uterus is about the size of a pear, and these ligaments are short and thick.

As your uterus grows — from pear-sized to watermelon-sized — these ligaments stretch significantly. Think of them like rubber bands that are being pulled longer and thinner. When they're stretched tight, sudden movements can cause them to contract or spasm, resulting in that sharp, jabbing pain.

What Does Round Ligament Pain Feel Like?

• A sharp, sudden stabbing or pulling sensation on one or both sides of your lower belly
• Most commonly felt on the right side (though it can happen on either)
• Located in your lower abdomen or groin area — where your belly meets your thigh
• Triggered by movement — sneezing, coughing, laughing, standing up, rolling over, or any sudden change in position
• Brief — lasting seconds to a few minutes
• Sometimes feels like a dull ache that lingers after the initial sharp pain

The pain can range from a quick twinge to something that makes you gasp and grab your side. Both are normal.

When Does It Happen?

Round ligament pain is most common in the second trimester (weeks 14-27), when your uterus is growing rapidly but your body hasn't fully adjusted yet. It can start as early as the late first trimester and may continue into the third trimester.

Many people notice it's worse:

• During exercise or physical activity
• After a long day on their feet
• When getting up from a sitting or lying position
• During sex
• When sneezing, coughing, or laughing

How to Ease the Pain

In the Moment

• Slow down. When you feel it coming on, stop what you're doing and rest.
• Bend toward the pain. Lean into the side that hurts — this takes tension off the ligament.
• Support your belly. Use your hands to support your lower belly when you stand up, sneeze, or cough.

Preventive Strategies

• Move slowly. The biggest trigger is sudden movement. Get up from chairs and bed gradually. Turn your whole body instead of twisting.
• Brace before you sneeze. If you feel a sneeze coming, bend your hips slightly and support your belly. This reduces the sudden pull on the ligaments.
• Try a belly support band. A maternity support belt distributes the weight of your belly and takes pressure off the ligaments. Many people find these helpful from the mid-second trimester onward.
• Warm compress. A warm (not hot) compress on the sore area can relax the muscles around the ligament.
• Gentle stretching. Prenatal yoga poses like cat-cow and gentle side stretches can keep the ligaments flexible.
• Prenatal massage. A qualified prenatal massage therapist can help with muscle tension around the ligaments.
• Warm bath. The warmth and buoyancy can ease ligament tension.
• Acetaminophen (Tylenol) if the aching lingers — check with your provider about appropriate use.

Round Ligament Pain vs. Something More Serious

Round ligament pain has some very specific characteristics that distinguish it from more concerning causes of abdominal pain:

Round ligament pain:

• Triggered by movement
• Sharp but brief (seconds to minutes)
• Stops when you rest or change position
• No other symptoms
• Pain is in the lower belly/groin, not upper abdomen

See your provider if the pain is:

• Constant or getting worse over time
• Not triggered by movement
• Accompanied by fever, chills, or vomiting
• Accompanied by bleeding or unusual discharge
• Located in your upper abdomen
• Coming in regular, rhythmic waves (could be contractions)
• Accompanied by burning during urination (could be UTI or kidney issue)

When to Call Your Provider

Contact your provider if:

• Pain is severe and doesn't go away with rest and position changes
• Pain is accompanied by bleeding or spotting
• You have a fever along with abdominal pain
• Pain is in your upper abdomen or under your ribs
• Pain comes in regular intervals — this could be contractions, especially if you're before 37 weeks
• You experience pain with urination or changes in urination
• The pain is constant, not just triggered by movement
• You just don't feel right — trust your instincts

It's always better to call and hear "that's just round ligament pain" than to ignore something that needs attention.

The Bottom Line

Round ligament pain is one of those pregnancy experiences that nobody fully prepares you for. The first time it happens, it can genuinely scare you. But once you know what it is, it becomes one of those annoying-but-manageable parts of growing a baby.

Your ligaments are stretching because your baby is growing. That's a good thing — even when it makes you yelp during a sneeze.

Sources

• American College of Obstetricians and Gynecologists (ACOG). Your Changing Body: Changes During Pregnancy.
• Cleveland Clinic. Round Ligament Pain.

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