Hi.. Welcome to Healthcare Magic.. I have gone through your query and can very well understand your health concerns.. As per your complain a small bump over the gums can be due to a few reasons: 1. It can be Gum abscess caused due to gum infection leading to pocket formation and abscess. 2. It can also be a traumatic gum abscess caused by some trauma like with toothbrush bristles or hard food like hard chips etc.. 3. It can also be a tooth abscess caused due to infection in tooth reaching below the tooth roots causing localizing of infection and pus leading to abscess formation. As you have a root canal treated tooth in that area it may or may not be a tooth related abscess and you should consult a dentist and get an x ray done to rule out the exact cause of the bump.. In case of abscess caused due to infection antibiotics like Amoxicillin and metrogyl will provide relief.. Warm saline gargles will help.. In case of abscess due to gum infection Scaling has to be done along with medicines.. In case of tooth abscess it if does not heal Apicectomy can be done.. If it is traumatic gum abscess it mostly heals on its own, you can do warm saline rinses.. Hope this information helps.. If you find the answer helpful please give me a Five Star Review and click on found the answer helpful as a token of appreciation.. Thanks and regards.. Dr.Honey Nandwani Arora..