A hard and tight stomach in the second trimester can be the result of false contractions, preterm labor, acute gastroenteritis, and other conditions.
1. False contractions: Irregular contractions that occur due to increased sensitivity of the myometrium before labor starts. They can be characterized by hardness and tightness of the stomach, and are generally irregular, non-periodic, non-progressive, and can be quickly recovered.
2. Preterm labor: If the symptoms of hardness and tightness of the belly pain persist and are regular, and even lumbar pain and swelling, vaginal bleeding may be signs of preterm labor, which need to be dealt with in a timely manner.
3. Acute gastroenteritis: If you eat cold or unclean food, it may lead to acute gastroenteritis, and there is no regular vague pain in the stomach, manifested as a hard and tight stomach, mostly accompanied by abdominal pain, diarrhea, nausea, vomiting and other gastrointestinal symptoms.
If you have a hard and tight stomach in the second trimester of pregnancy, you should consult a doctor to identify the cause of the problem for further treatment or therapy.