The biggest possibility of big tooth pain is pulpitis caused by tooth decay. If the tooth has spontaneous and severe pain at night, the patient can take anti-inflammatory drugs such as cephalosporin, erythromycin, amoxicillin, metronidazole and tinidazole tablets to reduce inflammation, and also take ibuprofen painkillers to relieve the pain, or use ice to apply cold compresses locally or press acupuncture points to relieve the pain, and at the same time the tooth should go to the hospital for root canal treatment as soon as possible. Root canal treatment can inactivate and remove the infected nerve, after this step the pain will be greatly relieved, then remove the infected material in the root canal, fill the root canal tightly with dental cement, through this series of treatment within the tooth inflammation eliminated, the pain disappeared, the crown defect is restored by porcelain crown or all-porcelain crown, the affected tooth will play chewing function like normal teeth.