Why Are the Backs of my Hands Scaly After Taking Accutane for One Month?

Your dermatologist can prescribe something to help this. I have also had great success wi Olay Body Butter with Cream Ribbons body wash.  It contains petrolatum which really helps the skin barrier.  You use it in the shower to cleanse with a nylon puff.  I also recommend using it to wash your hands. Make sure petrolatum is the first or second ingredient on the body wash as there are many different types of Olay body wash and some may exacerbate your skin. 

Dry skin happens from Accutane simply because part of the process of the medication is to dry out pores. While it can be irritating, it will happen. You can't use just any lotions, you need to use creamier lotions and they must be applied to the full body, after cool water. Applying lotion onto dry skin does nothing, as it's not absorbed. Because you wash your hands more (like after the restroom) you'll need to apply lotion again and again. Getting the skin wet without remoisturizing it after will make it excessively dry and irritating.