Oral infections are conditions that occur in the mouth, often caused by bacteria, viruses, or fungi. Common types include cavities, gum disease, and oral thrush. Symptoms may include pain, swelling, and difficulty eating or speaking. These infections can arise from poor oral hygiene, a weakened immune system, or other health issues. Treatment typically involves good dental care, medications, and sometimes dental procedures. Regular visits to a dentist can help prevent these infections and maintain overall oral health.