This thing: http://img94.imageshack.us/img94/251/img0732o.jpg
appeared after I shaved hair from my neck (with a disposable razor). It is rough to the touch, itches and scales. I've had this problem before in the same spot, but the lesion was bigger. It disappeared after 2-3 months.
I also had it on the front part of the neck, near the adam's apple. I got it there several times also after shaving with a disposable razor (now I shave with an electric one)
Does anyone know what it is? It's really bugging me.