Swollen gums without pain may be caused by wisdom teeth eruption, chronic periodontitis, gingival tumor, jawbone tumor and other reasons. 1. Wisdom teeth eruption: swollen gums without pain may be caused by normal wisdom teeth eruption, usually the swollen gums will be in the left and right sides of the innermost part. When the wisdom teeth grow out, the symptoms can disappear. 2. Chronic periodontitis: Chronic periodontitis can easily lead to irritation of the gum area, which can cause swollen gums without pain, and may be accompanied by symptoms of loose teeth. 3. Gingivoma: Gums swollen without pain may be gingival tumor, caused by the gums on the growths caused. Gingivoma includes congestive and fibrous type, which can lead to symptoms, and there may be bleeding gums. 4. Jawbone tumor: Jawbone tumor is due to the occurrence of space-occupying lesions within the jawbone, which can easily lead to swollen and painless gums. There may also be facial distortion. In normal times, it is recommended to do a good job of oral hygiene and cleanliness, and the symptoms of swollen gums without pain need to consult a doctor in time.