Yes, stomach pain during pregnancy is extremely common and usually harmless. Your body is undergoing rapid physical changes, from a growing uterus stretching muscles and ligaments to hormonal shifts that slow your entire digestive system. Most pregnancy-related abdominal discomfort falls into predictable patterns tied to each trimester. That said, certain types of pain signal something more serious, and knowing the difference matters.
Why Your Digestive System Hurts More Now
One of the most overlooked causes of stomach pain in pregnancy is plain old gas, bloating, and constipation. Pregnancy hormones, especially progesterone and relaxin, relax the smooth muscles throughout your gastrointestinal tract. This slows everything down: your colon, your small intestine, even the muscle between your esophagus and stomach. The result is more bloating, more trapped gas, more constipation, and more heartburn than you’ve probably ever experienced.
This can start in the first trimester and often gets worse as pregnancy progresses. The pain from trapped gas can be surprisingly sharp and may move around your abdomen, which makes it easy to mistake for something more concerning. If the discomfort comes and goes, shifts location, and improves after a bowel movement or passing gas, it’s almost certainly digestive.
Gentle movement helps. Brisk walking, water aerobics, and prenatal yoga can all get things moving through your digestive tract. A modified child’s pose, where you kneel and lean forward with your forehead toward the ground, can help release trapped gas. Standing twists, done gently with feet planted, put mild pressure on your core and offer relief too. For persistent gas pain, simethicone is an over-the-counter option that doesn’t enter the bloodstream, though it’s worth mentioning to your provider first.
Round Ligament Pain
Two thick ligaments run from the front of your uterus down into your groin. As your uterus grows, these ligaments stretch, and the sensation can range from a dull ache to a sharp, stabbing pull on one or both sides of your lower abdomen. Round ligament pain typically shows up during the second trimester, between weeks 14 and 27, though it can appear earlier or later.
The pain often hits suddenly when you change positions, sneeze, cough, or laugh. It tends to be brief, lasting seconds to minutes, and it goes away on its own. Slowing down when you shift positions and supporting your belly when you sneeze can reduce how often it happens. Round ligament pain is one of the most common reasons pregnant people worry something is wrong, but it’s a normal part of your body accommodating a growing baby.
Braxton Hicks Contractions
Starting in the second or third trimester, you may feel your uterus tighten and then release. These practice contractions, called Braxton Hicks, can feel like mild cramping or a tightening across your belly. They’re irregular, don’t follow a pattern, and tend to stay weak or even fade after starting strong.
The key differences from real labor contractions: Braxton Hicks usually stop when you change position, rest, or drink water. They’re felt mostly in the front of your abdomen. True labor contractions start in your back and wrap around to the front, come at regular intervals that get closer together, and steadily grow stronger regardless of what you do. If timing your contractions reveals no pattern and they go away with rest and hydration, you’re dealing with Braxton Hicks.
Urinary Tract Infections
Pregnancy increases your risk of urinary tract infections, and a UTI can cause pelvic pressure and lower abdominal discomfort that feels like general pregnancy pain. You might also notice burning with urination, a frequent urge to go, or pain during sex. If the infection spreads to your kidneys, it can cause back pain and flank pain on one or both sides. UTIs during pregnancy need treatment, so if your abdominal pain comes with any urinary symptoms, it’s worth getting checked.
Pain That Needs Immediate Attention
While most stomach pain in pregnancy is benign, a few situations require urgent evaluation.
Ectopic Pregnancy (First Trimester)
If you’re in early pregnancy and feel sharp pelvic pain, especially on one side, combined with light vaginal bleeding, this could indicate an ectopic pregnancy, where a fertilized egg implants outside the uterus. Some people have no unusual symptoms at first. If blood leaks from the fallopian tube, you may feel unexpected shoulder pain or a sudden urge to have a bowel movement. Severe pelvic pain with vaginal bleeding, extreme lightheadedness, or fainting is an emergency.
Placental Abruption (Third Trimester)
Placental abruption, where the placenta separates from the uterine wall before delivery, causes abdominal pain and back pain that typically begin suddenly. Your uterus may feel rigid or tender, and contractions may come one right after another. Vaginal bleeding is common but not always present. This is a medical emergency.
Preeclampsia
Upper abdominal pain, particularly under your ribs on the right side, can be a sign of preeclampsia or a related condition called HELLP syndrome. The pain comes from your liver swelling under pressure. It often accompanies other warning signs like severe headaches, vision changes (flashing lights, blurred vision, blind spots), or sudden swelling of your face and hands.
Red Flags Worth Memorizing
The CDC identifies several urgent maternal warning signs. For abdominal pain specifically, seek immediate care if your pain is:
- Sharp, stabbing, or cramp-like and severe, sudden, or worsening over time
- Accompanied by vaginal bleeding beyond light spotting, or fluid leaking from your vagina
- Paired with fever of 100.4°F or higher
- Combined with changes in your baby’s movement, particularly a noticeable decrease or stop in movement
- Occurring alongside dizziness, fainting, or vision changes
The general pattern: pain that is mild, comes and goes, responds to rest or position changes, and isn’t accompanied by bleeding, fever, or other symptoms is almost always normal pregnancy discomfort. Pain that is severe, constant or worsening, one-sided, or paired with any of the warning signs above deserves a call to your provider or a trip to the hospital. When in doubt, your care team would rather hear from you unnecessarily than miss something that matters.