The best way is to be able to carry out root canal treatment, which is also known as nerve killing. Pulpitis means that the tooth has been deeply decayed resulting in nerve infection, or the tooth has been excessively worn out causing tooth loss, so that the nerve is exposed and the bacteria invade into the pulp, root canal treatment is to remove the pulp while preserving the tooth. After the nerve is removed, the root canal is thoroughly sterilized and disinfected, and the canal is filled with a special material so that the root canal can remain sterile for a long time. After root canal treatment, the tooth will not hurt anymore. After root canal treatment, the tooth will become more fragile and it is better to put a crown on the tooth to protect the remaining roots.