Sharp pains during pregnancy are extremely common and, in most cases, completely harmless. The most frequent cause is round ligament pain, which affects a large number of pregnant people during the second trimester and lasts only seconds to minutes at a time. That said, certain types of sharp pain can signal something that needs medical attention, so knowing the difference matters.
Round Ligament Pain: The Most Common Culprit
Two thick bands of tissue called round ligaments run from the front of your uterus down into your groin. As your uterus grows, these ligaments stretch and thicken, and they can spasm when you move suddenly. The result is a quick, sharp, stabbing pain on one or both sides of your lower belly or groin.
Round ligament pain typically shows up during the second trimester (weeks 14 through 27), though it can start earlier or linger later. Common triggers include standing up too quickly, rolling over in bed, sneezing, coughing, laughing, and exercising. The pain usually lasts only a few seconds or minutes and then disappears on its own. If you notice that a sharp jab hits you when you change positions and fades almost immediately, round ligament pain is the likely explanation.
Gas and Digestive Pain
Pregnancy hormones relax the muscles throughout your intestines, which slows digestion and gives gas more time to build up. As the uterus grows, it also presses on your organs, slowing things down even further. The result can be surprisingly intense, sharp abdominal pain that stays in one spot or travels through your belly, back, and chest. Many people mistake trapped gas for something more serious because the pain can genuinely be excruciating, but it tends to come and go and often improves after passing gas, having a bowel movement, or changing positions.
Pelvic Girdle Pain
The joint at the front of your pelvis (the pubic symphysis) softens during pregnancy to prepare for delivery, and sometimes it loosens too much. This condition, called symphysis pubis dysfunction, can cause sudden shooting pain in the front or back of your pelvis, along with tingling, burning, or stabbing sensations that radiate into your lower abdomen, back, groin, and thighs.
Certain movements make it noticeably worse: walking, climbing stairs, getting in and out of a car, standing on one leg, rolling over in bed, or spreading your legs apart. Unlike round ligament pain, pelvic girdle pain tends to be more persistent and can interfere with daily activities. Physical therapy and a support belt are the most common ways to manage it.
When Sharp Pain May Signal a Problem
Most sharp pregnancy pains are brief, positional, and resolve on their own. The patterns below are different and worth taking seriously.
Ectopic Pregnancy (First Trimester)
If you’re in early pregnancy and feel sharp, persistent pain on one side of your lower abdomen or pelvis, an ectopic pregnancy is one possibility. This happens when a fertilized egg implants outside the uterus, usually in a fallopian tube. The pain is typically much worse on the affected side and doesn’t go away with position changes. In up to 20% of cases, a ruptured ectopic pregnancy causes severe tenderness, abdominal rigidity, dizziness, or signs of shock. This is a surgical emergency.
Placental Abruption (Second or Third Trimester)
Placental abruption occurs when the placenta separates from the uterine wall before delivery. The hallmark is sudden, ongoing pain in your abdomen or back that doesn’t let up, often accompanied by uterine tenderness and contractions that feel longer and more intense than normal. In severe cases, the uterus stays rigid and doesn’t relax between contractions, and there may be vaginal bleeding (though bleeding can also be concealed). Any sudden, unrelenting abdominal or back pain in later pregnancy warrants immediate evaluation.
Upper Right Pain and Preeclampsia
Sharp or persistent pain under your ribs on the right side, sometimes called epigastric pain, can be a sign of preeclampsia, a serious blood pressure condition. This pain is caused by swelling in the liver and is often confused with heartburn, gallbladder trouble, indigestion, or even the baby kicking. If you notice this type of pain along with a headache, vision changes, or sudden swelling in your face or hands, get it checked right away.
Kidney Infections
Urinary tract infections are more common during pregnancy, and if one spreads to the kidneys, it can cause sharp flank pain in your back along with fever, painful urination, and an urgent need to pee. A simple bladder infection causes burning and frequency but not back pain. When you add flank pain and fever to the mix, the infection has likely reached the kidneys, and treatment shouldn’t wait.
How to Tell Contractions From Other Pain
One of the biggest concerns with sharp belly pain later in pregnancy is whether it could be preterm labor. True labor contractions have a distinctive pattern: they come at regular intervals, get closer together over time, consistently last 30 to 70 seconds, and intensify until you can’t walk or talk through them. Changing positions or resting doesn’t make them stop.
False contractions (Braxton Hicks) are irregular and unpredictable, last 20 to 40 seconds, and tend to ease up when you change positions or rest. A good rule of thumb: if you can make the sensation go away, it probably isn’t labor. Also, contractions make your entire belly harden and cramp. If you feel one hard area surrounded by softer spots, that’s more likely the baby’s bottom or a limb pressing against your uterus.
Patterns That Should Reassure You
The sharp pains that are almost always harmless share a few features. They’re brief, lasting seconds to a few minutes. They happen with specific movements like standing, rolling, coughing, or walking. They don’t get progressively worse over time. And they aren’t accompanied by bleeding, fever, dizziness, or changes in your vision.
If your pain is short-lived, triggered by movement, and goes away on its own, you’re most likely experiencing one of the normal growing pains of pregnancy. Slowing down when you change positions, wearing a belly support band, and staying active with gentle movement can all help reduce how often these pains show up.