Why does the stomach become hard after slight movement at 27 weeks of pregnancy, and what should be done?

Under normal circumstances, a hardening of the abdomen upon slight movement at 27 weeks of pregnancy may be caused by false labor contractions (Braxton Hicks), uterine enlargement stretching ligaments, preterm labor signs, placental abruption, or red degeneration of uterine fibroids. Depending on the specific situation, improvements can be achieved through general management, medication, or surgical treatment. Detailed analysis is as follows:

1. False Labor Contractions (Braxton Hicks)

In the second and third trimesters, the uterus becomes more sensitive. Physical activity may stimulate the uterine smooth muscle, causing irregular contractions that manifest as abdominal hardening. Reducing physical activity, resting in bed, relaxing, and avoiding excessive fatigue usually help alleviate symptoms.

2. Uterine Enlargement Stretching Ligaments

As the uterus grows, the ligaments supporting it are stretched. Movement can intensify this stretching, possibly leading to abdominal hardening. Slowing down walking pace, avoiding prolonged walking, and changing positions appropriately can reduce ligament strain.

3. Preterm Labor

Regular uterine contractions accompanied by abdominal hardening and pain may indicate preterm labor. Under medical guidance, medications such as ritodrine tablets, atosiban injection, or nifedipine sustained-release tablets may be used to suppress contractions. Bed rest and close monitoring of fetal heart rate are also recommended.

4. Placental Abruption

If part or all of the placenta detaches prematurely, sudden abdominal hardening, severe abdominal pain, and vaginal bleeding may occur. Immediate medical attention is required. Delivery is typically completed via cesarean section to prevent life-threatening complications for both mother and baby.

5. Red Degeneration of Uterine Fibroids

During pregnancy, uterine fibroids may undergo red degeneration due to ischemia and necrosis, presenting as abdominal hardening and pain. Under medical supervision, medications such as cefuroxime axetil tablets, phloroglucinol injection, or magnesium sulfate injection may be prescribed. In severe cases, myomectomy (fibroid removal surgery) may be necessary.

Pregnant women should avoid strenuous exercise and walk within their physical limits. Regular prenatal checkups are essential to monitor uterine and fetal health. If abdominal hardening is accompanied by pain, bleeding, or other concerning symptoms, prompt medical evaluation is crucial—do not delay seeking care.