To reduce swelling after a tooth extraction, you can continue applying ice and take anti-inflammatory medication if needed. You can also try rinsing your mouth with salt water. Swelling can persist for up to two weeks after the extraction. It is important to follow proper oral hygiene practices to prevent infection and the buildup of food particles in the extraction sites. If you experience persistent drainage or foul odor from the extraction site, consult with your dentist for further evaluation.