Greetings. I am 57, 80 kg. 1.80cm. Have been suffering from redish, drier, itching, discomfort on the tip of my penis for about three years. Doctors siaid it is contact dematitis. Medical treatments included foban+zinc oxide+petrolatium mixture ointment. Yet, it improves for a while and comes back after the treatment. How can I get rid of this?