What are the raised white lines in people's mouths (on both sides)? (Photo)

Identifying a symptomatic cracked tooth can be challenging. There are a few methods that can help:1) WaitingTime will make the offending tooth known. This is usually because the symptoms (tenderness on chewing or thermal sensitivity) will tend to get worse if there is a truly cracked tooth. Radiographic (xray) changes related to a crack will also become more obvious. Waiting also helps to eliminate other diagnoses, such as tooth tenderness from bruxism (grinding of teeth) or referred pain from sinusitis.

I would see a dermatologist, who is also trained in identifying and managing diseases of both the skin and the mucosa (lining of the mouth), for evaluation and management. Lip ulcers that are persistent could be a sign of a viral infection (herpes simplex), a venous malformation, or a traumatized salivary gland (mucocele). It could also be something more serious like an actinic keratosis.