Hello... I'm a guy of 21 yrs,and I've been very clean with my sexual habits i.e I haven't been engaged in any intercourse or anything until now. The only thing which I do is masturbation. Basically,I've a brown skin on my shaft and most part of it was brown until the last 15 days where I spotted a small white spot which almost looked like a healing wound skin(don't mistake this with me having an injury on my penis shaft),but I've noticed that the white spot is increasing day by day and now its about 0.3 cms in diameter. Although it has no itching at all,but some times when dry looks like some whitish powdery layer has been accumulated on it and when rubbed gently,it tends to get away. But on usual times when the skin isn't dry,it looks pinkish in colour with no white powdery substance. Now,my question is what is this and why is this happening here? Is it Vitiligo or something? I'm really scared,tensed and mentally disturbed about this. And,can the discoloration be restored back to normal skin colour?