Lumps on the lip and inner cheek and tongue are frequently bitten accidentally by the patient and are best removed.
This also helps to confirm a diagnosis when the tissue is sent for pathology.
Changes in the surface appearance of the mucosa (or skin) in the mouth also requires a review. Often a biopsy of these areas is required. It is important to avoid placing creams, drops etc on these areas prior to examination by the surgeon as this can confuse the possible diagnosis.