Why do ground teeth not hurt during the day and hurt at night?

Ground teeth do not hurt during the day and hurt at night, which may be related to pulpitis caused by excessive grinding of tooth tissue or high water temperature during grinding.
1. Excessive abraded tooth tissue: clinically, abraded teeth generally refer to abraded abutment teeth that have been partially abraded to serve as fixed bridge retainers. Too much abraded tissue causes exposure of dentin, resulting in pulpal tissue congestion, edema, hot and cold sensitivity, and then symptoms of pulpitis, manifested as daytime pain and nighttime pain.
The reason for no pain during the day and pain at night is mainly related to the patient’s position. During the day is the upright position, pulp congestion, edema caused by pressure is small, the performance is not too painful; night sleep lying down when the pulp tissue congestion, edema is obvious, the pressure in the pulp cavity increases, resulting in significant toothache.
2. Too little water and too high temperature in the process of teeth grinding: If the amount of water and temperature are too small in the process of teeth grinding, the pulp will be stimulated to produce congestion and edema. And because the pulp tissue nerves, blood vessels are in the hard closed pulp cavity, when the pulp tissue congestion, edema will produce pressure, compression of the nerve pain symptoms. At night, when the pressure increases due to a change in position, the pain becomes more pronounced.
Ground teeth do not hurt during the day and night pain may have other reasons, should be timely consultation, improve the examination, standardized treatment under the guidance of a professional physician, in order to avoid adverse effects.