Stomach pain during pregnancy can show up in very different places depending on the cause, and the location often tells you a lot about what’s going on. Some pain is a normal part of your body adapting to a growing baby. Other types, especially when sharp or sudden, can signal something that needs medical attention. Here’s a breakdown of the most common types of pregnancy-related abdominal pain, where you’ll feel each one, and what it means.
Lower Abdomen and Groin: Round Ligament Pain
The most common source of abdominal pain in pregnancy is round ligament pain, a stretching sensation in the lower pelvis, hips, or groin. It typically kicks in during the second trimester (weeks 14 through 27) when your uterus starts growing more rapidly. The round ligaments are bands of tissue that support the uterus, and as the uterus expands, these ligaments stretch and sometimes spasm.
You might feel it on one side or both. It often comes on with sudden movements like standing up quickly, coughing, or rolling over in bed. For most women, round ligament pain is brief and sharp, then fades. It tends to ease by the third trimester, though some women experience it earlier or later than the typical window.
All Over the Abdomen: Gas and Bloating
In the first trimester especially, rising progesterone levels relax the muscles throughout your body, including the walls of your intestines. That slows digestion significantly. At the same time, higher estrogen encourages your body to retain water and gas. The result is bloating, cramping, and gassy pain that can range from mild discomfort to surprisingly intense pressure anywhere in the abdomen, back, or even chest. This type of pain is often diffuse rather than pinpointed to one spot, and it tends to come and go with meals.
Front of the Belly: Braxton Hicks Contractions
Braxton Hicks contractions, sometimes called “practice contractions,” produce a tightening sensation concentrated in the front of your belly. They can start as early as the second trimester but become more noticeable in the third. They’re irregular, don’t get progressively stronger, and usually stop if you change positions or drink water.
True labor contractions feel different in location and intensity. They typically start in the lower back or cervix and radiate through the belly and sometimes the whole body. They come at regular intervals and get closer together over time. If your contractions follow a pattern and intensify, that’s labor, not Braxton Hicks.
Pubic Bone and Sacroiliac Joints: Pelvic Girdle Pain
Pelvic girdle pain, sometimes called symphysis pubis dysfunction, centers on the joint at the front of your pelvis (the pubic symphysis) and the sacroiliac joints at the back where your spine meets your pelvis. It often appears around 30 weeks but can start earlier. Hormonal changes loosen the ligaments holding these joints together, and the added weight of the baby puts extra stress on them.
The pain can feel like a shooting sensation in the pubic area, with radiation into the lower abdomen, groin, thighs, or lower back. Walking, climbing stairs, or rolling over in bed often makes it worse. It can affect one side or both, and for some women it persists mildly even after delivery.
Upper Right Abdomen: Gallbladder Problems
Pregnancy increases the risk of gallstones because hormonal shifts slow the emptying of the gallbladder. The hallmark symptom is pain in the upper right part of the stomach, near the ribs. It often strikes about an hour after eating a fatty meal. Milder episodes (biliary colic) happen when a stone temporarily blocks a bile duct and resolve on their own. More severe, persistent pain with fever or vomiting can indicate gallbladder inflammation, which needs medical evaluation.
Upper Right Abdomen With High Blood Pressure: Preeclampsia
Severe pain in the upper right area of your abdomen can also be a warning sign of preeclampsia, a serious pregnancy complication involving high blood pressure and organ stress. This pain comes from the liver swelling and developing microscopic damage. It usually appears after 20 weeks and is accompanied by other symptoms: persistent headache that doesn’t respond to medication, vision changes like blurriness or seeing spots, and sometimes sudden swelling of the face or hands. Upper right abdominal pain in the context of any of these symptoms is a medical emergency.
One-Sided Pelvic Pain in Early Pregnancy: Ectopic Pregnancy
In the first trimester, sharp pain on one side of the pelvis can indicate an ectopic pregnancy, where a fertilized egg implants outside the uterus, most often in a fallopian tube. The earliest warning signs are typically light vaginal bleeding and pelvic pain. As the situation progresses, you may feel shoulder pain or pressure in the rectum, both caused by internal bleeding irritating nearby nerves. Extreme dizziness, fainting, or severe pelvic pain with bleeding are signs of a ruptured ectopic pregnancy, which is life-threatening and requires immediate emergency care.
Lower Abdomen or Back With Bleeding: Placental Abruption
Placental abruption occurs when the placenta separates from the uterine wall before delivery. It’s most common in the third trimester. The pain can show up as sudden, ongoing cramping or sharp pain in the lower pelvis, abdomen, or back. It’s often accompanied by vaginal bleeding, though sometimes the bleeding is hidden internally. Contractions may feel longer and more intense than normal labor contractions, and the uterus may feel tender to the touch. Pain can range from mild cramping to severe, unrelenting abdominal or back pain that comes on without warning.
Flank and Lower Back: Kidney Infections
Pregnancy makes urinary tract infections more likely, and untreated UTIs can progress to kidney infections (pyelonephritis). A kidney infection produces pain in the flank, the area of your back between the lower ribs and the hip, usually on one side. You’ll also likely have the typical UTI symptoms: burning with urination, frequent urges to urinate, and possibly fever or chills. Kidney infections during pregnancy need prompt treatment because they can trigger preterm labor.
What the Location Tells You
As a general guide, where you feel the pain narrows down the possible causes considerably:
- Lower pelvis or groin: Round ligament pain (common, usually harmless), ectopic pregnancy in early weeks (urgent)
- Front of the belly: Braxton Hicks contractions, gas and bloating
- Upper right abdomen near ribs: Gallbladder issues, preeclampsia, liver complications
- Pubic bone or lower back joints: Pelvic girdle pain
- One-sided flank or back: Kidney infection
- Lower abdomen with bleeding: Placental abruption
Pain that is mild, brief, and related to movement or digestion is usually part of your body adjusting to pregnancy. Pain that is sudden, severe, persistent, or paired with bleeding, fever, vision changes, or dizziness points to something that needs immediate evaluation. The combination of where you feel it and what else is happening alongside it is what matters most.