Because your jaw may not have enough space for your wisdom teeth, they can emerge at awkward angles resulting in crowded space. If they erupt they may erupt partially through the gums causing a gum tissue flap to grow over them. Food and germs are more easily prone to get caught under this flap and become difficult to clean resulting in infection.
Your wisdom teeth can also become impacted meaning they become stuck in the jaw and never break through the gums. Serious complications can arise from impacted teeth including infection or damage to the bone, nerves or other teeth.
Wisdom teeth extraction is an out patient surgery and generally requires only a few days recovery time. Local anesthetic is usually used to numb the area around the tooth unless multiple or all wisdom teeth will be removed in which case a general anesthetic is sometimes used.
During the extraction process the gum tissue is opened over the tooth and any bone on the surface of the tooth is removed. The tissue connecting the tooth to the bone is separated and the tooth is then removed. In some cases the tooth is broken into smaller pieces for easier extraction.
After the tooth is removed, you may need stitches. Cotton gauze is placed over the wound to help stop the bleeding.