How do you make swelling go down in the mouth?

To reduce swelling in the mouth, rinse with warm salt water to help soothe inflammation and promote healing. Applying a cold compress to the outside of the mouth can also alleviate swelling and discomfort. Over-the-counter anti-inflammatory medications, such as ibuprofen, may be effective in reducing swelling as well. If the swelling persists or is accompanied by severe pain, it's important to consult a healthcare professional.