Hello Pimple shown in image indicate underlying infection in your teeth and it may be sinus for pus  draining, get confirmed with X-ray. If you have pain then get this medicine Tab. Augmentin 625 mg BD Tab. Zerodol SP. BD Tab. Pan 40 mg OD For 3 days.

Hello, Based on the images provided and your description, the "pimple-like" bump on your gum (often referred to as a parulis or gum boil) along with the surrounding swelling and redness is usually a sign of localized inflammation or an underlying infection. Even though the pain and swelling seem to be reducing slightly, it is very important not to ignore it. A reduction in swelling can sometimes mean that trapped pressure or fluid was released, but the underlying root cause usually remains. Possible Causes 1. Gingival or Periodontal Abscess: An accumulation of pus due to localized gum inflammation, plaque buildup, or trapped food particles between the teeth and gums. 2. Periapical Abscess (Tooth Infection): An infection originating from the root of a tooth, which drains out through the gum tissue creating a bump. 3. Local Trauma or Irritation: A minor scratch or injury to the interdental papilla (the gum between your teeth) that became inflamed.