40 Foods That Cause Inflammation. Inflammation is the outstanding factor in most chronic diseases. Heart disease, stroke, lupus, rheumatoid arthritis, and fibromyalgia are just a few on a very long list of diseases caused by or worsened by inflammation. The swelling and pain are hard to deal with, but it isn’t always a bad thing. It’s a natural part of the body’s healing process.You see this when you sprain your ankle, get a cut, or even when a bruise pops up—the area gets puffy, red, and might throb in pain. This is your body’s response to injury and it’s perfectly normal. However, there are many other factors that can cause unnecessary inflammation and discomfort.Food is one of the most important aspects of maintaining a healthy lifestyle, and keeping your inflammation under control through healthy eating is vital—especially if you have a chronic inflammatory disease. Medication and other treatments are necessary and changing your diet isn’t a magic cure, but it can provide you with relief from pain or reduce the number of flare-ups you have.In general, you want to eat lots of fruits, vegetables, plant-based proteins like nuts and beans, fish, and fresh herbs. Of course, you should always talk to your doctor before making any dietary changes. Avoiding processed food is the biggest factor in reducing inflammation. Trans fats, oils, sugar, salt, wheat products, and dairy are hard for our bodies to process, which can lead to the painful swelling and headaches associated with inflammation.But what foods can actually cause inflammation, and why? If you want to know the answer to that question then keep reading to learn about 40 foods that cause inflammation.