Gum recession is related to lifestyle, age, excessive bite force and periodontitis, which can be treated by lifestyle changes, bite force reduction, medication or surgery. 1. Lifestyle: Frequent use of hard toothbrushes or poor-quality toothpaste will stimulate the gums to recede, resulting in large gaps and gum recession. It is recommended to replace the toothbrush with a more comfortable one in time. 2. Age factors: for the older age groups, gum recession is more common, mainly due to long-term stimulation of the gums cumulative formation, this situation generally do not need special treatment, pay more attention to oral hygiene. 3. Excessive bite force: If the patient’s teeth are not aligned or there is teeth grinding phenomenon, it is recommended that timely orthodontic or wear braces to reduce the bite force of the teeth, thus alleviating the discomfort of the teeth. 4. Periodontitis: periodontitis is also one of the main causes of gum recession, the need for local periodontal treatment under the guidance of a doctor as an aid to take metronidazole and other antibacterial and anti-inflammatory drugs for treatment. If necessary, it is necessary to use artificial membrane gingiva covered by surgical means in the area of gum recession. Teeth gap is getting bigger and bigger gum recession, it is recommended to go to the hospital in time for treatment.