Wisdom teeth may cause mouth ulcers mainly related to wisdom teeth irritation, but also may be caused by food impaction. 1. Wisdom teeth stimulation, if the wisdom teeth grow abnormally, the wisdom teeth tip is relatively sharp, the chewing process may stimulate the oral mucosa, resulting in oral ulcers. 2. Food impaction, some patients with oral ulcers may also have a certain relationship with the wisdom teeth food impaction, after the emergence of wisdom teeth due to the wisdom teeth teeth are not in the right position, the chewing process may produce food impaction, which will lead to bacterial growth, oral ulcers. If the mouth ulcers caused by wisdom teeth recur, it is recommended to actively seek medical examination and treatment, and if necessary, the wisdom teeth need to be removed, so as not to lead to disease, affecting the recovery of the body.