As a chef and food writer, I paid close attention to a spot on my tongue that doctors repeatedly dismissed until a biopsy revealed cancer.Reviewed by Dietitian Maria Laura Haddad-GarciaCredit: Photo: Suzanne Podhaizer. EatingWell Design.Key PointsOral cancer can happen even without classic risk factors like smoking.Persistent mouth sores should be checked by a dentist and may need a biopsy.Self-advocacy matters when symptoms persist or a diagnos…