At 30 weeks of pregnancy, pregnant women feel tightness and hardness in the stomach, which needs to be analyzed specifically according to the presence or absence of pain, frequency of occurrence, etc. It may be caused by pseudo contractions, and there is also the possibility of preterm labor, so pregnant women need to go to the hospital for examination in time to confirm the cause to avoid accidents. Common causes and treatment 1, pseudo contractions: the uterus appears more frequent, weak intensity, and irregular pain, so pregnant women will have tightness, hardness and abdominal pain in the lower abdomen. Generally, they occur more frequently at night and can be reduced after changing position and disappear the next morning, which is usually a normal physiological phenomenon and requires no special treatment. If the contractions are obvious and the discomfort worsens, you need to seek medical attention in time; 2. Preterm labor: manifested by paroxysmal hardness and tightness of the stomach, accompanied by the discharge of vaginal bloody discharge and strong abdominal pain, you need to go to the hospital in time and use medication under the guidance of professional doctors, such as indomethacin, nifedipine, etc. If necessary, you need to terminate the pregnancy in time to protect the safety of mother and child. Pregnant women should have regular maternity checkups at 30 weeks of pregnancy to keep an eye on the fetus and ensure adequate nutrition to ensure fetal growth and development. In addition, you should avoid standing or sitting for a long time, avoid intense exercise, and pay attention to personal hygiene to avoid infection.