For this reason, in our day and age they can be surplus to requirements and we often do not have space for them to erupt.
For most people, they will erupt and only cause mild discomfort as they come through. For others they will cause considerable pain.
Some of the symptoms you might experience include: pain around your gums, difficulty opening mouth, bleeding/tender gums, pus coming from the gums and possibly swollen glands near the area.
You may notice the pain appear and then disappear. This could be happening over a long time period. The pain can be from the eruption process itself (this is often mild discomfort/pain) or from the local inflammation in the gum surrounding the wisdom tooth (Pericorinitis). Pericorinitis means the gums around the erupting wisdom tooth is inflamed as food and bacteria are trapped. The area then swells up and then the opposing tooth can bite on the inflamed area which makes the problem even worse.
Because of their position, wisdom teeth are also likely to get gum disease and decay as they can be difficult for patients to keep clean.