Symptoms of tooth nerve pain include pain triggered by cold, hot, sour, sweet stimuli, spontaneous pain, secondary pain, and nighttime pain, as well as unlocalized pain. These are also the main symptoms of pulpitis. Among them, pain triggered by cold, hot, sour, and sweet stimuli is more obvious. Sometimes the pain may intensify with temperature changes, such as cold and hot stimuli. If the pulpitis reaches the acute suppurative stage, there may also be pain that worsens with heat and is relieved by cold. It is common to see patients coming to the clinic holding cold water, indicating that cold water may provide temporary pain relief. In addition, severe nighttime pain might occur, where there is no pain during the day, but intense pain at night, sometimes making it difficult to sleep or waking from sleep due to the pain. Sometimes tooth nerve pain can also be unlocalized, potentially causing pain in the temporal area or affecting both upper and lower jaw teeth.