Yes, it’s normal for dentures to shift or move in the mouth, especially if they do not fit well or if they have become worn over time. This can cause discomfort, difficulty speaking or eating, and may also lead to sore spots on the gums. If your dentures are shifting or moving frequently, it’s important to visit your dentist to have them checked and adjusted as needed. In some cases, a reline or remaking of the denture may be necessary to ensure a proper fit.