Dental pain in the morning and no pain at night may be caused by reusable pulpitis, trigeminal neuralgia and other diseases, as follows. 1. Reproducible pulpitis: the manifestation of cold, hot, sour and sweet stimulation of the momentary pain response, stimulation removed after the pain will disappear, no spontaneous pain. Activities such as eating and drinking in the morning may stimulate the affected teeth to cause pain, and the affected teeth are not stimulated at night when you sleep, so no pain will occur. 2. Trigeminal neuralgia: Trigger points exist, and trigeminal nerve pain flares up after triggering the trigger points, similar to a toothache. Activities such as washing your face, brushing your teeth, smiling, etc. in the morning may trigger the trigger point and cause pain, but if the trigger point is not triggered at night when you are sleeping, there is no pain symptom. There may be other reasons why your teeth hurt in the morning and not at night, so it is recommended that you go to the hospital in a timely manner to get a clear picture of the cause of your tooth pain and get targeted treatment.