Skin care is very important after the transplant because of the side effects of the anti-rejection medicines. The drugs required to prevent your immune system from rejecting the kidney will also prevent the immune system from eliminating warts and skin cancers. Most transplant patients develop skin warts after a year or two. Usually these are no more than an inconvenience, however some patients may develop large numbers of very troublesome warts on the body. These warts tend to be very persistent and difficult to treat. Skin concerns are far more common in transplant patients.