If you're using vegetable oil to cook your meals, consider switching to Extra Virgin Olive Oil. Vegetable oil contains high levels of omega-6 fatty acids (not to be confused with omega-3) which are not only unhealthy in large doses, but can also lead to inflammation and swelling. 
Extra Virgin Olive Oil contains a chemical compound known as oleocanthal, which not only gives olive oil its taste but also mimics the effects of NSAID painkillers when ingested. Extra Virgin Olive Oil also contains Polyphenol compounds which are powerful antioxidants and are known to “decrease the production of messaging molecules responsible for inflammation, inhibit pro-inflammatory enzymes, and decrease the synthesis of the enzyme inducible nitric oxide synthase.” Reports point to this Oil as a superior cooking ingredient when it comes to health: “Researchers worldwide find that a diet rich in olive oil polyphenols is associated with healthier breast tissue, colon function, cardiovascular function, and a protection from the inflammatory effects of secondary smoke and other environmental toxins” So in contrast, olive oil is your best defense in fighting inflammation, not to mention it is readily available in any market and comes in a variety of styles and flavoring.

• Consider adding Extra Virgin Olive Oil to your diet by making your own salad dressings. Most store-bought salad dressings contain large amounts of sugar and preservatives in their ingredients.
• Also, consider using it as a sauce for pastas, bread, or pizzas.
• Drizzle over fresh mozzarella, tomato slices, etc.
• Make a pesto sauce by combining garlic, basil, olive oil, and pine nuts; use the pesto as a dipping sauce, spread it on your fish dishes, use as a pasta sauce, add it to your salads, or spread it on your sandwiches