Coffee gives my sties, too. But it depends on the coffee, so I think it might be fungicide they spray on it upsetting my native flora and fauna. I'm only buying organic coffee now that I've used up this last bag of cheap stuff. I'm crossing my fingers that it will help.
My vitiligo is growing more lately. Stress is high, so that's probably most of it.
Steak, eggs, potatoes - fruits, nuts, berries and forage. Coconut milk and potent herbs and spices. Tea instead of coffee now and teeny amounts of kelp daily. Let's see how this does! Not really had dairy much, and gut seems better for it.