What are the key signs of oral infection?

The key signs of oral infection include redness, swelling, and pain. These symptoms are indicative of inflammation and infection in the oral tissues. Redness typically occurs due to increased blood flow as the body responds to infection, indicating that an immune response is activated in the affected area. Swelling is another physical manifestation of the body's inflammatory response, as fluids accumulate in the tissues. Pain often accompanies these symptoms, serving as a signal that something is wrong in the oral cavity and indicating irritation of the nerves in the affected area.

While other options list some dental issues, they do not directly identify the primary indicators of an infection. For example, bleeding and bad breath can relate to infections but may also occur due to other conditions. Tooth sensitivity, similarly, can arise from various dental problems, not limited to infection. Cavities and gum recession primarily indicate dental decay and periodontal issues rather than active infection signs, while dry mouth and plaque buildup refer to other oral health conditions rather than acute infection symptoms. Understanding these key signs is crucial for identifying potential infections early and seeking appropriate treatment.