It's very important to understand the true nature of the poltergeist phenomenon. The best defining mark of a poltergeist is any manipulation of the physical environment, such as the movement of objects, physical attacks, spontaneous combustion, etc. Much of the time, the Poltergeist phenomenon is incorrectly credited to mischievous spirits, ghosts or extremely negative entities. However, more modern scientific studies reveal convincing arguments that poltergeists are associated with psychokinesis, which is the ability to move things by power of the mind alone. This kinetic type of energy remains unexplained, but even some mainstream scientists are starting to explore the idea that it does exist, and it's one of the few paranormal theories that has a bit of solid scientific and psychological evidence behind it.
Are They Spirits?
Usually, after a subtle and somewhat calm start, the activity will become more intense, manifesting itself through voices and even the appearance of full apparitions. Furniture may slide across the room and beds may shake. Sometimes the effects of a poltergeist are more playful than harmful, but sometimes the activity has been known to be downright nasty. Reports of scratches, bites, harmful objects being put in one's way such as glass shards on a pillow or tacks under a bed sheet have been noted, as well as possession. Poltergeists build over time to a climax, then start over. They can travel anywhere. Most poltergeists nearing the climax of their energy can become dangerous to the living. Inflicting both mental and physical terror in extreme cases. Poltergeist hauntings seem to mysteriously go away as quickly as they began. The most famous and terrible accounts of a poltergeist attacking a family is the Bell Witch.
Causes and Factors
In true poltergeist hauntings, none of the activity will continue after the person is removed from the environment, as they are not there to create it or influence a possible unseen entity. It has been reported, however, that activity can return later if the "right" person visits or lives in a significantly haunted place. This would lead one to believe that it requires combined psychic energy to manifest such terrible hauntings. In most cases, relieving the inner problems of the individual is the key to stopping the poltergeist activity.
To Sum It Up
Poltergeist activity provides an excellent opportunity for researchers to document strange phenomena, but these cases most likely won't have anything to do with ghosts and there is really no way to help the victims. It's usually best to refer the family to a good counselor or mental health care provider rather than try to act as a paranormal investigator. A mental health professional is the best person to provide assistance under these circumstances since psychokenesis normally manifests because of significant emotional disturbance.