In 2009, a man was stopped at the airport when his fingerprints couldn’t be recorded. It turned out that his cancer medication was causing his fingerprints to vanish. The cancer treatment drug Capecitabine is known to cause swelling in the hands and feet, called hand-foot syndrome. This syndrome can also cause the skin to peel and cause blisters. Though it is rare, this can affect someone’s fingerprints, but after stopping the medication, your fingerprints will go back to normal.