Teeth longer gum recession may be related to bad brushing habits, age, periodontitis and other factors, need to go to the regular hospital in time for treatment. 1. Bad brushing habits: Incorrect brushing and irregular brushing may lead to damage to the gums and alveolar bone, resulting in recession and longer teeth. 2. Ageing: With the gradual increase of age, the body function will slowly decline, and the gums may shrink, resulting in excessive exposure of teeth and the illusion of longer teeth. 3. Periodontitis: due to inflammation stimulation, may lead to periodontal tissues to varying degrees of damage, resulting in periodontal pockets, alveolar bone resorption, which can be manifested as teeth longer, gum recession. If there is discomfort, timely medical treatment, teeth longer gum recession can be based on the actual situation of the cause of treatment, usually pay attention to the way to brush teeth, keep the oral cavity clean.