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Dr. Ankit Bahal answered : 11 years ago
there are many reasons of mouth not opening. cancer may be the rarest of them, if you are not taking tobacco. kindly consult a nearby dentist.
Dr. Krupesh Rajani answered : 11 years ago
You might be an habitual of tobacco chewing/smoking. You should stop your habit first. There is a treatment for this with Intralesional injections. Consult an Oral & Maxillofacial Surgeon for treatment. After this treatment you may be completely cured of this and will be able to open your mouth completely