Acute pulpitis pain at night can be changed position, cold compresses, temporary use of painkillers, it is best to go to the emergency department of the oral cavity, or the next day in time to see the doctor, to open the pulp treatment. The clinical manifestations of acute pulpitis have night pain, mainly because of the change of body position, the pressure in the pulp cavity increases. So you can sit up or stand up to see if you can get some relief. Septic pulpitis is characterized by hot pain and cold relief, so you can try local cold compresses. You can also take oral pain medication, such as ibuprofen capsules, if you are unable to get to the doctor in time. It is best to visit an emergency dental department or a prompt hospital visit the following day for pulp-opening treatment. The pain can be relieved by draining the inflammatory exudate from the pulp cavity. Medications should be used under medical supervision.