Sudden hyperpigmentation??

Around, 14 years ago I had a operation to remove a large amount of hyperpigmentation from my body and it went well though recently my skin has become irritable and over the course of only 2 days my skin has gone from pale white to a deep black. My current wife did not know about my previous hyperpigmentation and is returning from a work trip in a few days, what can I do as a temporary solution to stop her from thinking I've been black all this time.