Gum is red and sore
Red, tender gums often reflect plaque-related inflammation, but a local injury, ulcer, trapped food, or infection can also be responsible.
The short answer
Red, sore gums most often reflect inflammation at the gingival margin, although trapped food, brushing injury, an ulcer, or a tooth-related infection can cause the same appearance. A dental examination checks plaque, calculus, gum pockets, the nearby tooth, and any drainage or ulceration.
What is the direct answer?
What does this question mean?
The gingiva can become red when blood flow and inflammatory fluid increase in response to irritation. Tenderness may occur at one papilla between teeth, around a partially erupted tooth, or across several areas of the gum line.
What can you do next?
Clean gently with a soft toothbrush and fluoride toothpaste, and remove food between the teeth with floss or an appropriately sized interdental brush. Do not scrub the sore area or puncture a lump; note whether bleeding, bad taste, pain, or swelling is changing.
When should you seek dental care?
Arrange a dental assessment if redness lasts, recurs, bleeds readily, or is accompanied by persistent bad breath or loose teeth. Seek urgent care for facial swelling, fever, severe toothache, pus, or difficulty opening the mouth or swallowing.
What should you ask the dentist?
Ask whether the irritation is gingivitis, periodontal disease, trauma, an ulcer, or an infection from a tooth. Ask for the cleaning method, pocket measurements, and treatment plan that match the cause.
Frequently asked questions
Should I stop brushing a sore gum?
Continue gentle cleaning with a soft brush because leaving plaque undisturbed can prolong inflammation.
Why does one spot bleed?
A single bleeding spot may be irritated by trapped food, plaque, calculus, trauma, or inflammation around a nearby tooth.