Final answer:
Patients who are overly tired or stressed at the time of their dental appointment will generally demonstrate a lower pain reaction threshold, which means they have a low tolerance for pain.
Step-by-step explanation:
Patients who are overly tired or stressed at the time of their dental appointment will generally demonstrate a lower pain reaction threshold, which means they have a low tolerance for pain. When the body is exhausted or stressed, it becomes more sensitive to pain stimuli. This lowered pain tolerance can make dental procedures more uncomfortable for these patients.