Pulpitis is divided into acute pulpitis and chronic pulpitis. The symptoms of chronic pulpitis are not as apparent. When acute pulpitis occurs, it manifests as nocturnal pain, pain stimulated by hot and cold, spontaneous pain, and the pain is difficult to localize. Patients experience severe pain when rinsing with cold or hot water, or when brushing their teeth. The pain intensifies during the quiet of the night. Another symptom is referred pain; when one tooth hurts, it can cause pain in half the face and half the head. If these symptoms appear, it is generally diagnosed as pulpitis, and it is crucial to go to the hospital for diagnosis and treatment as soon as possible.