Gums have been swollen without pain without eliminating considerations and gingival hyperplasia, chronic periodontitis, gingival tumor and so on. 1. Gingival hyperplasia: often caused by dental caries, localized plaque, calculus, food debris and other factors, the gingival mucosa due to long-term chronic inflammatory stimulation leading to mucosal hyperplasia and swelling, not accompanied by pain. 2. Chronic periodontitis: chronic periodontitis is usually caused by the slow progress of gingivitis, there is usually plaque, calculus accumulation, and then stimulate the gums caused by swelling, may not be accompanied by pain. 3. Gingivoma: refers to the inflammatory proliferation of the connective tissue of the gums and periodontal membrane, similar to tumor lesions, which can also be manifested as swelling of the gums, but does not hurt and does not reduce swelling. Gums have been swollen pain does not go away may also be related to other reasons, it is recommended to consult a doctor in a timely manner to clarify the cause, and standardized treatment under the guidance of the doctor.