Crying can be triggered by almost any kind of situation you can imagine. Conventional scenarios include being happy; being sad; sharing something that has great significance to the individual and being in a public speaking situation. Evidently weeping has nothing to do with feeling sad or vulnerable. There’s no reason I can think of why it happens, but it does.
Is it good of bad?
People who feel better after crying tend to share certain commonalities that may make their experiences therapeutic: For example, they are more apt to have been comforted by someone after crying; they’re not crying alone. They are also more likely to see whatever made them cry helping them improve their life quality by understanding their problems. They are also less likely to have been embarrassed or shamed by the experience.
According to scientific research, people who are confused about the sources of their own emotions report little benefit from a burst of tears. The purpose of crying may be to block thinking, to effectively seal off the flood of unanswerable questions that come after any major loss, the better to clarify those that are most important or most practical. If this psychological system is already clunky, a fire shower of tears is not likely to improve it.
If relief, and/or a magical solution to the cause of the grief is the only thing expected from crying, it is clear that nothing will improve. Usually people who suffer a great loss suddenly and unexpected tend to have this kind of ideas. WIn situations where they can not undo the cause of their grief, but you they realize they can achieve a gradual acceptance of the loss while grieving (which may involve crying) and find the path towards the healing process.
Crying is all right in its way while it lasts. But you have to stop sooner or later, and then you still have to decide what to do.