Hello. You have given the symptoms of pericoronitis which is associated with the eruption of the wisdom tooth. After finishing your exam do visit a Maxillofacial Surgeon for the same. Start with warm saline rinses 4-5times daily and take analgesics so and so. Keep that area clean.
Next Steps
After exam visit to Maxillofacial Surgeon and x Ray of that tooth and removal of the tooth of required.
Health Tips
Avoid hot and spicy food.