There are many reasons for sore and soft teeth after delivery, such as the need for a large amount of calcium for postpartum recovery, especially during breastfeeding, the greater the amount of milk secretion, the greater the need for calcium, and at the same time, the body’s ability to renew calcium in the bones before menstruation is poor, the calcium needed in the milk is often taken from the calcium in the bones of the body, so if not supplemented with enough calcium teeth will appear sore and soft. And the patient in the sitting month eat more, take care of the newborn time busy neglected oral hygiene, so that food residue plaque accumulation, slowly breeding bacteria easily lead to teeth related symptoms, induced tooth soreness. Too little vitamin intake can also lead to sore and soft teeth, so even during the menstrual period, you should not be lazy, maintain good oral hygiene, brush your teeth in the morning and evening, rinse your mouth with light salt water after eating, pay attention to good dietary habits, and immediately check and treat your teeth accordingly when they become uncomfortable.