What Causes Discoloration In Neck Area While Having Blood Pressure?

I am 49, 5'8'', 200 lb. I was born in Cuba. I am taking enalapril 20mg, my blood pressure is pretty much controlled. Almost never above 130/80. I also take prevacid (one table a day), for a ulcer that was diagnosed 2.5 years ago.
That said, i am prety healthy. About a year ago I started noticing a coloration change in the neck area. By now is very obvious, it looks like a sun burnt skin, or as if the skin would get stretch, the area is red with whiter dots all over. The white dots are small circles that sort of reminds of a chicken skin after you pluck the feathers.
I've been told to rub cortizone paste, but it has not help. I can send a picture if you want me to. What it could be.
Thank you very much,