Waking up in the morning with a sticky substance on the teeth may be caused by gingivitis, saliva, poor oral hygiene and other reasons. 1. Gingivitis: refers to inflammation of the gum tissue caused by plaque and other factors, often manifested as bleeding gums when brushing or biting hard objects, accompanied by changes in the color, shape and texture of the gums, there will be a white sticky secretion. 2. Saliva: eat something too spicy and stimulating or too salty, not enough water supplementation, or sleep at night with the mouth open will lead to the next morning when you wake up on the teeth with mucus. 3. Poor oral hygiene: some patients maintain poor oral hygiene will lead to wake up in the morning on the teeth with sticky material, mostly food debris has been the metabolism of bacteria and so on. If the symptoms are not relieved after lifestyle modification, you should consult a doctor in a timely manner to clarify the cause of the disease, and under the guidance of the doctor for treatment.