Your Wisdom Teeth are the last to erupt at the back of the mouth, usually between the ages of 18 and 22. Sometimes they appear many years later.
Nowadays people often have jaws that are too small for all 32 teeth with some mouths only having 28 teeth or less. So if all other teeth are present and healthy there may not be enough space for the wisdom teeth to come through properly.
No. If there
is sufficient space for them to erupt into, then they give no problems.
If there
is not enough space for them to erupt properly into they get impacted
(stuck) against the next tooth. This can act as food and plaque
trap and is usually very difficult to clean. This can lead to decay
of the Wisdom Tooth and the adjacent tooth. Also gum infection
leading to a swelling and soreness often takes place.
Also as the Wisdom Tooth erupts into the mouth it can cause soreness. This is like teething pain but in adults!