I ate spicy food alot specially onions in the evening then suddenly i feel some pain on my teeth.If your gums are suddenly swollen, here are some steps you can take to help reduce the swelling:

1. Salt Water Rinse: Mix a teaspoon of salt in a glass of warm water and rinse your mouth several times a day. This can help reduce inflammation and kill bacteria.

2. Cold Compress: Apply a cold compress to the outside of your cheek for 15-20 minutes. This can help reduce swelling and numb any pain.

3. Over-the-Counter Pain Relieef: Consider taking an over-the-counter pain reliever, such as ibuprofen or acetaminophen, to help with discomfort.

4. Good Oral Hygiene: Continue to brush your teeth gently and floss to keep your mouth clean. Avoid irritating the swollen area.

5. Avoid Irritants: Stay away from tobacco, alcohol, and spicy or acidic foods that could aggravate the swelling.

6. Stay Hydrated: Drink plenty of water to stay hydrated and support overall oral health.

7. Consult a Dentiist: If the swelling persists for more than a couple of days, or if you experience severe pain, fever, or difficulty swallowing, it’s important to see a dentist for a professional evaluation.

Always seek professional medical advice for any health concerns.