The spot on my neck just appeared one day and is more noticeable at times, but is always there. It doesn't usually hurt, it's not a bruise or anything. Nothing I can think out wouldve caused it. My neck has started to hurt on the sides, but I don't know if it's because of this or not. If I push on the discolored spot, it never hurts or feels any different. I don't know what this is, can anyone tell me?