The hardness and tightness of the stomach in the 28th week of pregnancy is caused by uterine contractions, including false contractions or regular contractions.
1. False contractions: if this kind of stomach tightening and hardening occurs irregularly, lasts for an irregular period of time, varies in strength and weakness, and has no pain, then this kind of tightening and hardening is a false contraction, which can be relieved after resting, and is a physiological phenomenon in the late stage of pregnancy.
2. Regular contractions: If this kind of stomach tightness and hardness, the duration is getting longer and longer, the interval is getting shorter and shorter, the intensity is getting stronger and stronger, or accompanied by vaginal bleeding, premature rupture of membranes, etc., generally considered to be regular contractions, the appearance of regular contractions in the 28th week of pregnancy is a sign of preterm labor, and you should go to the hospital as soon as possible to consult the doctor for treatment.