Yes you can wear make up if you need to. The reason we say not to is because the drier the skin is kept over that period, the quicker the skin will crack and peel off. But if you need to wear make up it just means it may take a day longer.
Please wash it off quickly at the end of the day with a bar of normal soap and pat dry quick. Apply nothing to the skin and let it stay dry. It will feel tight and dry and this is normal.