Why do teeth hurt at night but not during the day?

Jun 24, 2024 Source: Cainiu Health
Disease description:

My teeth have been hurting at night for the past few days, but there is no pain during the day. May I ask what are the possible causes for tooth pain occurring at night but not during the day?

Doctor's answer (1)
Dr. Guo Huijie
The phenomenon of tooth pain at night but not during the day is usually associated with various oral health issues. 1. It could be a sign of periodontitis, as when lying down horizontally at night, blood circulation to the head increases and the pain-sensitive nerves become relatively more sensitive, leading to intensified pain. 2. Pulpitis is another possible cause, especially when tooth decay has reached the dental pulp. The increased blood flow to the head at night can accelerate blood circulation within the pulp chamber, possibly stimulating the pulp and causing severe pain. 3. Acute apical periodontitis may also cause nighttime pain, with symptoms including persistent throbbing pain and pain upon biting. Due to increased blood circulation in the head and heightened sensitivity of pain receptors at night, these conditions may cause more pronounced discomfort. If such symptoms occur, it is advisable to seek timely medical attention to determine the cause and receive appropriate treatment.