Tongue purple with teeth marks may be related to pigment residue, blood stagnation or spleen and stomach dysfunction, etc. The specific cause of the disease requires patients to go to a regular hospital, under the guidance of the doctor for a clear diagnosis, targeted treatment. 1. Pigment residue: Eating some purple food caused by the tongue pigment residue related. After excluding this cause, patients should pay attention to frequent observation of the disease, the body has no other symptoms of discomfort. 2. Blood stagnation: It indicates that there is stagnant blood in the body, or lack of oxygen caused by certain heart diseases. Patients may have poor menstruation, ecchymosis on the skin and other phenomena. It is necessary for the patient to go to a specialized hospital to treat the primary disease. Patients with purple red tongue with teeth marks should go to the hospital to clarify the cause of the disease and carry out targeted treatment. In daily life, we should maintain a light and nutritious diet, eat more easy-to-digest food, eat less spicy and stimulating food; usually pay attention to exercise and avoid staying up late.