Wisdom teeth refer to the eighth tooth in the upper and lower jaws, which usually erupts in adulthood. Wisdom teeth often cause inflammation of the surrounding tissues or decay of the adjacent teeth due to malposition. However, many people are not sure which cases need to be removed, and the doctor will suggest you to remove them as soon as possible in one of the following cases: 1. repeated inflammation of wisdom teeth, swelling, pain, etc.; 2. wisdom teeth decay; 3. causing decay of adjacent teeth; 4. wisdom teeth elongation leading to food impaction; 5. wisdom teeth need to be removed due to orthodontic teeth; 6. wisdom teeth obstruction secondary to cyst; 7. young women before pregnancy preparation (prevention) (Preventing pericoronitis of wisdom teeth during pregnancy); 8.Pressing nerve leading to neuralgia symptoms.