Gums with a bag without pain and itching, may be the apical periodontitis, gingival hyperplasia, gum tumor and other diseases. 1. Periapical periodontitis: Infection around the root of the tooth, there may be the formation of purulent inflammatory reaction, which leads to the gums have protruding lumps, the early stage of the gums may also lead to the gums bag painless and itchy, and then there will be pus secretion overflow. 2. Gingival hyperplasia: Gingival hyperplasia caused by various reasons of stimulation can also lead to painless and itchy gums. 3. Gum tumors: benign tumors of the gums or malignant tumors such as gum cancer can also cause itchy gums. Gums caused by the bag does not itch, there may be other reasons, you need to go to the hospital in a timely manner to check, clear the cause.