What are the changes in my body when I detox from alcohol?

Can you answer Alexander R’s question about Addiction?:

Over the past few years I’ve been a heavy drinker. When I stop altogether for a few days I get bags and black patches under my eyes and altogether look like crap. If I start drinking again it all goes away and I look fine.

Is this what happens when the alcohol leaves your body? How long does this last? Is it normal?

Teen Drug Recovery