Symptoms like the skin diorders you have mentioned don't tend to appear when you are in the mode of accumulating toxins and waste, except when you have reached a saturation point and the "cup" is overflowing. However, as you start using foods or beverages that have strong cleansing properties, you unleash a flood of toxins that don't find their way out of the body, unless the main organs of elimination are open and clean and able to remove what comes through them. If clogged up (consiptated colon, stones in the kidneys and bile ducts of the liver) the skin will need to be engaged in removing part of the toxic, acidic waste. AS this happens, the skin gets dehydrated,damgaged, discolored and thinner.
I would not use green drinks until the main organs of elimination are fairly clean. Green drinks are filled with panat antibodies that have toxic, irritating effects on the GI-tract lining and immune system. If not detoxified properly, they can cause major skin destruction, too.