During pregnancy, the increased levels of oestrogen and progesterone in the body can cause oedema in the gums of the tooth area, and the resulting soreness of the teeth is a normal phenomenon that can be recovered in a stable state of hormone levels after delivery. However, it is important to note that sore teeth caused by oral diseases such as caries, cryptodontia and dentin sensitivity do not usually recover after childbirth, so pregnant women should be aware of this and should seek medical advice to identify the cause.