<s>[INST] Over the last 4 days, the gum above my right front tooth became sore, was red but not swollen, formed a kind of head (no pus), and today has a small brown scab. Still a little sore, but very localized and not swollen. Any ideas about what this could be and whether it requires immediate attention? [/INST] Hello, Welcome Thanks for consulting Chat Doctor, I have gone through your query, as you have gum sore this can be due to periodontal problem. You can apply gum paint on sore gum two - three times a day for one week. Do Luke warm saline gargle two - three times a consult dentist for investigations IOWA x-ray and go for scaling and curettage if periodontal problem and if due to periapical pathology then go for Root canal treatment if needed. Hope this will help you. </s>