Oral ulcers generally do not cause fever, and common oral ulcers usually heal on their own within about a week. In the initial days, they may manifest as localized pain. In cases of severe or recurrent oral ulcers, or when accompanied by fungal and other bacterial infections, there might be occurrences of fever. In such cases, it is generally recommended for patients to take oral anti-inflammatory medications or antipyretic analgesics to reduce inflammation and fever. Firstly, patients must pay attention to oral hygiene and avoid consuming spicy and irritating foods. Additionally, it is advised that patients visit a hospital for consultation, where they can have a complete blood count test and ensure to rest properly. (The use of medications should be conducted under the guidance of a professional doctor.)