I heard that sugar can cause inflamation.

From Google:

Do eggs cause inflammation?
Consuming eggs regularly can lead to an increased amount of swelling and joint pain. The yolks contain arachidonic acid, which helps trigger inflammation in the body. Eggs also contain saturated fat which can also induce joint pain.

Is oatmeal an inflammatory food?
Oatmeal has anti-Inflammatory properties.

Oats boast 24 phenolic compounds — plant compounds that have antioxidant properties. One antioxidant group called avenanthramides are found almost exclusively in oats and help reduce inflammation and protect against coronary heart disease.

Does cheese cause inflammation?
It's clear that a diet high in saturated fats – which are plentiful in cheese and full-fat dairy products – can increase inflammation.

Do potatoes cause inflammation?
Nightshade vegetables, such as potatoes, tomatoes, and eggplants, contain solanine. This substance may increase the leakiness of the intestines and affect the gastrointestinal microbiota, indirectly increasing the inflammation relating to arthritis.

Is rice an inflammatory?
Refined carbohydratesFoods that contain flour, such as breads and crackers, and foods such as white rice and instant mashed potatoes are high-glycemic foods that cause inflammation.