The causes of pulpitis mainly include the following: 1, dental caries: also known as tooth decay or worm teeth, dental caries if not treated in time, dental caries developed to the pulp cavity, resulting in inflammation of the dental pulp is pulpitis; 2, trauma: broken teeth or bruises caused by trauma, resulting in pulpitis; 3, chronic trauma: bad brushing habits lead to tooth defects, long term, the defects to a certain extent caused by pulpitis; bad biting habits lead to excessive dental trauma, can also cause pulpitis.