Pulpitis pain does not resolve itself without medication or root canal treatment, but it is usually cured in about a month after treatment. Pulpitis is categorized into reusable pulpitis and irreducible pulpitis, which is often caused by tooth decay. Reusable pulpitis is characterized by transient pain in response to external stimuli, and if the condition persists, it can progress to irreducible pulpitis. The treatment of irreducible pulpitis requires root canal therapy to remove the infected pulp in order to eliminate the pain, the treatment cycle is usually about a month, the length of time is related to the degree of inflammation, if not treated, the pain will worsen and develop into periapical periodontitis, the tooth will be a long time pain without improvement. It is recommended to seek medical treatment as soon as possible to avoid aggravation of symptoms affecting work and life.