I have had this dark spot on the back of my neck for about a year now. It is rough to the touch and it is like a brownish/blackish color. I do not have this anywhere else on my body but I am very self conscious about it. I do itch at it sometimes. I thought it was just dry skin and washed my neck every night. But I still have it. I thought it was hair dye but it has been too long and it still appears. I am not the skinniest and I guess you could say for my age I am a tad-bit overweight. Can anyone please help me get an idea of what this is.