After drinking a few beers, the next morning, my left breast tissue feels very bruised and tender, pain, my back feels very sensitive, like sunburn?

See your doctor: If you have fatty liver, i strongly suspect you are drinking more than a "few, " - or that term means something else to you than it does to me. If you have a fatty liver, you should not be drinking any alcohol at all. Whether the fatty liver is from obesity or drinking alcohol, more alcohol will only make it worse, and can lead to scarring, cirrhosis, liver failure and liver cancer. See your dr.