Hi Hazel,
I have it on my neck as well, just hard to see in that picture. Ussually it is on the front of the neck, except for under the chin there is a white V- shaped spot .
Nappy rash! That's good. I guess I could classify mine like that sometimes as well.
I have to laught about "Nappies", my mother's family is orginally from Canada (Quebec) Most of them live now in New England. I live in Germany, so I speak english and german ( although my english suffers because I use german everyday). My Aunt and Uncle (he was in the Air Force) they were stationed at RAF Lakenheath. Thier son was about 10 years old at the time. His name is Napoleon Joeseph Saindon. His nickname was "Nappy". Because in the US it is called a diaper or Pamper this was not a problem. But in England! To this day (he is now 50 something years old) He is known as Uncle Joe.
Grüß,
Monique