What causes bump in lower gum?
Patient: I felt a bump on the inside of my lower gum just below the last tooth. I scraped it with a dental pick and a hard white lump was removed and the area now feels like an ulcer. Upon further probing I realized that the tissue seems perforated to the bone. I could feel bone. I have been swishing with warm salt water. Should I see the dentist ASAP? Also, I have a long history of Bruxism Doctor: Thanks for your query, I have gone through your query.The bump on the gum can be a periapical or periodontal abscess which on scraping has ruptured and exposed the underlying bone. Consult a oral physician and get it ruled out. If there is tooth infection get the tooth treated with RCT or extraction. If there is gum infection, then get your teeth cleaned once. Do not traumatise the tissues with tooth pick or pin, the mucosa or tissue will get infected.  Mean while you can take a course of antibiotics like amoxicillin 500mg and metronidazole 400mg tid for 5 days (if you are not allergic). I hope my answer will help you, take care.