12 days line on neck

I had a rash on my neck. I wore a coat and it left an indent. It is pretty bad. Its been 12 days. Do you think it will heal? I have a pic.

The coat was tight around neck? Or indent from fabric could be allergy. Need a bit more info. Include pic and has it developed into a rash or itch?

How do i post pics? The coat didnt feel to tight. It just left indent. It doesnt itch. Its basically an indent neck line. I dont have alergies