If the pain is not obvious, it can be treated without treatment. Under normal circumstances, painless uterine contraction occurs after 12-14 weeks of pregnancy. As the pregnancy time is extended, the frequency of uterine contractions will increase. It is recommended to relax and go to the hospital for prenatal check-ups regularly. If you have dental problems caused by calcium deficiency, you should pay attention to calcium supplementation. You can eat more foods with high calcium content such as milk, soy products, black sesame seeds, black fungus, etc., and you can also take some calcium supplements.