Tooth pain from eating ice can have many causes, including tooth sensitivity, tooth decay, and enamel damage, and should be desensitized or restored with a crown to address the cause. If the pain when eating ice is due to tooth sensitivity, you need to try to avoid eating foods that are too cold to reduce the irritation to your teeth. At the same time, use some anti-allergic toothpaste when brushing or go to the hospital for anti-allergic restoration to improve the tooth’s ability to tolerate. If the nerve of the tooth is damaged due to dental caries, the bad part needs to be removed and the damaged area is filled and repaired with composite resin to avoid the exposure of the nerve of the tooth. If it is due to a hidden crack or wedge-shaped defect that reaches deep into the pulp of the tooth, the pulp will need to be removed and root canal treatment will be performed. It is also important to pay attention to oral hygiene in daily life by brushing teeth in the morning and evening and rinsing the mouth after meals to prevent bacterial growth and avoid tooth sensitivity and caries.