Inflammation is at the heart of many metabolic diseases and conditions. As someone who has suffered from chronic inflammation myself, I can identify with your painful symptoms. The good news is that diet and some supplementation can make a huge difference.
I recommend consulting with a natural doctor or specialist for specific advice for your condition. There are, nevertheless, some general guidelines that you can try:
Overall, you'll want to consume whole foods, not processed or manufactured ones. Organic foods should be your first choice in general, for both meat and vegetables (meat is not generally an inflammation promoter, as long as you stick with traditionally-raised and pastured (grass-fed) sources). Avoid sugar, artificial sweeteners, vegetable oils, trans-fats, refined foods and deep-fried foods.
Yes, eliminate nightshades (tomatoes, peppers, potatoes, eggplant, tobacco) from your vegetable selections. Nightshades contain an alkaloid called solanine that can trigger problems in some individuals. Also eliminate grains (even whole grains) from your diet, as grains are known to contain lectins and anti-nutrients that promote inflammation. This will include all breads, pasta, rice, cereals, oats, or anything containing flour or gluten. You'll get plenty of carbohydrates from vegetables and fruits.
Finally, I would (at least in the short term) eliminate some of the other common food sensitivity triggers (dairy products, peanuts, shellfish, etc). While you may be able to tolerate these products personally, it is best to eliminate them at first, get your inflammation under control, and see if you're able to add them back later.
What can you eat? Organic sources of meat, poultry, fish, eggs, tons of vegetables, nuts and seeds, and some fruit. Don't forget to get plenty of omega-3s in the form of oily fish, avocados, olive oil, and other sources. I also recommend taking a good fish-oil twice a day, in liquid form, as this is a known inflammation-fighter.
Finally, turmeric and ginger are known to help keep inflammation at bay; you may want to try incorporating more of those spices in your diet.
Response by Greg Carver