As the body builds up, then it cleans house and I was wondering if that was what was happening to you.
However, I believe that folks who drink a lot of alcohol also have parasites -- the Sugar brings them in -- you'd have to dig around for that info -- check out Ask Barefoot Herbalist; he is great on who gets them.
As well as the meat, there also needs to be a lot of raw fats and lots of green juices. The beer is not adding anything good to your system and may be bringing out the worst aspect of the beef. Only my opinion.
I have read so much this past year and -- almost -- for every 'yes' to a particular way of eating, there is another 'no' to that same way of eating. Then I found We Want To Live by Aajonus Vonderplanitz who created The Primal Diet as a result of his own horrendous experience and the explanations seemed to make sense. BUT -- it is a much more balanced way of eating than you are doing. You may want to check it out so that you can enjoy your beef, but also your health.
He states that parasites and microbes move in where they are needed to clean up.