If you are not having burning pain... that distracts you daily, I don't think you need the ice treatments.

What the contrasting baths do is retrain the brain and spinal cord.
The theory is that the pathways of chronic pain are "learned" and are formed over time in chronic conditions, and then are difficult to un-learn. This is all unconscious. The contrasting ice/heat baths, override the other pain signals present and train the brain to temperature.

If you don't have chronic pain anymore, you probably don't need the contrasting temperature baths.

But if certain foods and drinks flare you, I think you should avoid them for now. You might be able to go back to them in a few months, but this might also signal that you are sensitive to them, and if you have another incident or injury, you may become reactive again to them. I think wine is a very difficult thing to consume. It has polyphenols which dilate blood vessels, congeners from the fermentation left in the bottle, sulfites which many people react to, and then the alcohol.