Concerning cheese: REALLY bad for my skin, get oily skin, or unsmooth skin. But if I eat a lot of animal fat, I don't get that for some reason.
What kind of cheese exactly is doing this to you? I have the same skin problems with most milk products especially heated and concentrated and i think most people with digestive problems will have the same experience.
But there is huge difference between different milk products. In my opinion their digestibility is:
aged raw cheese - aged 1,2 or more years - this should be practically predigested by bacteria and very easy to digest even for people with casein allergy
raw unaged cheese - aged less than 6 -12 months - concentrated casein and very difficult to digest for people with casein intolerance
raw milk from A1 cows - better that pasteurised but still have casein and lactose
raw milk from A2 cows or other animals - better that raw A1 casein
raw kefir - not much better than raw milk unless very fermented which i never could achieve with kefir
raw youghurt or clabbered milk - i think if you make it very sour this will be the most easy to digest food - the problem is that when i try to ferment clabbered milk for more that 2-3 days it gets moldy - i tried to add bacteria to raw milk and then let it clabber at 25 o C but still get moldy. There are video on youtube of people making clabbered milk and i see they get separation of casein and whey - some say only after 1 or 2 days - mine is not working. Maybe the temp is too low here or maybe the humidity is too high but i get a lot of mold on the surface of milk
pasteurised milk products - disaster for digestion
Most people buy some raw cheese like brie or roquefort or camembert and they think this is aged cheese - it is not aged it is hard cheese and not so fresh as mozarella but it is not aged cheese. Really aged cheese have sharp taste and is crumby.