Please tell me what are the symptoms of tori or mouth cancer?

Let's be clear: Torus of the palate is a common variant, like a chin cleft, and is not cancer. Mouth cancer announces itself as marked discoloration and/or a mass.

Different problems: A tori is a growth of normal bone in the upper or lower jaw. Cancer is a malignancy that can present as a mass or ulcer. If you are concerned, seek an exam with an oral surgeon or ENT doc.