If the toothache is caused by dentin sensitivity, you can use anti-sensitivity toothpaste, etc. If it is caused by caries or wedge-shaped defects, you should have a filling, and if there is pulpitis, you should have a root canal.
If there is dentin sensitivity, there can be teeth encounter hot, cold, sour and sweet stimuli such as transient pain. Usually, you should use toothpaste with low friction and anti-sensitivity toothpaste containing potassium nitrate, sodium calcium phosphosilicate, tin fluoride and other ingredients, and develop proper brushing habits, such as avoiding brushing with too much force to avoid causing wedge-shaped defects.
If the wedge-shaped defect is caused by improper brushing, it should be restored by resin bonding. If caries is present, toothache can occur, resin fillings can be performed when caries is shallow, and root canal treatment is needed when caries is deep.
If the toothache is obvious, go to the hospital in time for examination and timely treatment.