Mandibular necrosis may lead to localized pain, swelling, limited mouth opening and other symptoms. 1. Local pain: osteonecrosis of the jaw may be caused by trauma or long-term inflammatory stimulation, in the early stage will often lead to severe pain around, with the aggravation of local necrosis will affect the local blood pain, symptoms have been reduced. 2. Swelling: mandibular necrosis in the early stage will often lead to localized diffuse swelling, will feel the face obviously asymmetric. 3. Restriction of mouth opening: after osteonecrosis of the jaw, the local activity rate will be restricted, especially when opening the mouth, it will feel difficult to open the mouth, and often accompanied by slurred speech and other symptoms. When osteonecrosis of the jaw is more serious, it may have a great impact on daily life, so it is necessary to go to the hospital in time and cooperate with the doctor to take treatment.