Root canal is too thin is a congenital factor, if there is no symptom can not need to do treatment, if the tooth pain has inflammation, should go to the hospital to do a thorough root canal treatment. 1. Everyone’s teeth have root canals, which contain the pulp, but everyone’s root canals are different in thickness, and some people’s root canals are naturally very thin, so if the tooth is healthy and has no symptoms, it can be left untreated. Once the tooth appears spontaneous pain, hot and cold stimulation pain, night pain, pain can not be localized, suspected of pulpitis, this time should be root canal treatment. 2. As the root canals of these people are very thin, it is very difficult for ordinary files to enter, if this root canal has no symptoms, it can be filled directly without treatment, if this root canal is also infected, then it is necessary to go to a medical institution with better medical equipment to perform a thorough root canal treatment. To summarize, if the root canal is too thin and the tooth is healthy and asymptomatic, it can be left untreated, but if the root canal is infected and inflamed, it is necessary to go to the hospital in time to have a thorough root canal treatment.