It's not hard to learn how to deal with the minor pain of a cavity long enough for it to become a major even potentially life threatening issue. Dittio for thigs like a minor acke that's the sign of an early cancer ect. Overall pain is generally a really important issue and solid pain for over a week without obvious cause is a major warning sign that should not be ignored.
PS: Only after a reigorious investigation should someone look into developing coping skills.
A delay in pursuing an effective treatment can be extremely significant. For example, if one simply tries to will away a broken bone, it can set incorrectly and cause permanent damage.
