Wisdom teeth are the third and final molars on both sides of the upper and lower jaws that generally appear between the ages of 16 and 25. Since wisdom teeth are the last permanent teeth, there might not be enough room left in your mouth when they come in. As a result, some wisdom teeth may be misaligned, either horizontally angled towards, away, inward or outward from the second molars. Some wisdom teeth can also be impacted and grow undetected until they start to cause issues like swelling and tenderness. Generally, wisdom teeth are extracted either because they are potentially problematic or have become impacted.