Gums encasing teeth can be caused by acute periodontitis, gingival hyperplasia, or abnormal tooth development, and can usually be treated with localized rinses, periodontal therapy, or surgery. 1. Acute periodontitis: When acute inflammation of the gums occurs, the gums may become severely congested and swollen, causing the gums to enclose the teeth. At this time, local rinsing and medication, while the patient can use metronidazole, ornidazole and other drugs for anti-inflammatory treatment under the guidance of the doctor, to be relieved in the acute phase, and then periodontal treatment, and good dental care. 2. Gingival hyperplasia: when the gums appear hyperplasia, the volume of the gums will usually appear significantly increased, and in severe cases, the hyperplasia even cover or wrap the teeth. Gingival hyperplasia can usually be surgically removed. 3. Dental developmental abnormalities: Dental developmental abnormalities are usually due to the process of tooth eruption, some teeth due to the position and direction of the incorrect teeth can not fully erupt, and ultimately lead to some or all of the unerupted teeth are covered by the gums, and adults most often occurs in the wisdom teeth eruption abnormalities. This can be treated by gingivoplasty or by extracting the teeth under the gums. If the patient also has obvious pain or physical discomfort, it is recommended to go to a professional dental hospital or stomatology department in time for relevant examinations to find out the cause and timely treatment.