The causes of half of the face swelling are as follows: first, common, such as gingivitis or wisdom teeth caused by half of the face swelling, you can take oral metronidazole anti-infection treatment. After treatment, the swollen face can generally be relieved, and if it is a wisdom tooth can choose to remove the wisdom tooth. The second, common cause, such as acute mumps, can cause half of the face to swell. In addition, infections elsewhere can also lead to swelling of the lymph nodes in the face, which can cause half of the face to swell. Third, half of the face may be swollen due to sleeping in the wrong position, resulting in pressure on one side of the face, caused by poor blood circulation, you can use hot towels to promote blood circulation. Fourth, half of the face swollen to consider may have lymphatic reflux obstruction caused by, to further examination.