Fever of 103°F before treatment followed by another fever of 100°F with new pus and swelling is not something to ignore after an RCT. It may indicate that the infection is still active or that there is another area that needs treatment. An examination is needed to determine the cause.
Next Steps
Please contact your dentist/oral surgeon today for an urgent review. They may need to examine the swelling, check the treated tooth and surrounding tissues, and decide whether further drainage or other treatment is required. Continue the prescribed medicines exactly as advised and do not change or stop antibiotics on your own.
Warm salt-water rinses can be done gently, but do not squeeze, press or massage the swelling/pus area unless your treating dentist specifically demonstrates that it is appropriate.
Health Tips
Keep the area clean and use gentle warm salt-water rinses a few times a day, without vigorous swishing. Stay hydrated and monitor your temperature.
Go to an emergency department immediately if you develop difficulty breathing or swallowing, rapidly increasing facial/neck swelling, inability to open your mouth properly, severe weakness/confusion, or worsening high fever