Level 1: Causes of swollen and painful gums during pregnancy During pregnancy, gums become more sensitive due to changes in hormonal levels. In addition, the physical burden during pregnancy increases and the immune system changes, which may lead to gum swelling and pain. Level 2: How to prevent gum swelling and pain during pregnancy Prevention is the best treatment. It is recommended to start regular oral health check-ups before pregnancy and maintain good oral hygiene habits. At the same time, you should pay attention to a healthy diet during pregnancy and avoid excessive consumption of sweets, carbonated drinks and other foods that can easily cause tooth decay and oral problems.