Second, the reason for this situation is that the toothbrush hair is too hard and the brushing method is incorrect. The bad symptoms of teeth are due to the existence of wedge-shaped defects, which make the pulp sensitive to external cold and hot stimuli.
Third, we should go to the stomatological hospital to repair the wedge-shaped defect in time. If it is not repaired in time, the tooth will easily break from the root.
I wish you an early health.
If the answer is satisfactory, please accept the support. Thank you.