When you encounter oral cancer, it's important to tell your dentist about any symptoms you're experiencing. Although some people do not have any symptoms, especially in the early stage of cancer, other symptoms may include pain in the mouth, cannot disappear, lumps or lymph node enlargement, can not reduce the size, and facial numbness.
Because some of the symptoms are vague, it's hard to notice, so it's best to check with a professional. Your dentist can check your mouth for your regular checkups to make sure there are no signs of cancer.