If your jaw is not large enough, it will not allow room for your wisdom tooth to grow. When this happens, the wisdom tooth might become impacted in your jaw. The teeth might be trapped at an angle, while other times they might be trapped horizontally or vertically beneath the gum tissue.
In other cases, your tooth might only grow part way and then a flap of gum tissue might grow over it. This could lead to bacterial infection if food particles become stuck between the excess gum tissue and teeth.
Wisdom tooth crowding could also cause your teeth to grow in a way that they cut into your cheeks. The chance of this happening increases if your teeth and jaw bones are not properly aligned.